September holidays 2026

September 2026 Calendar with Holidays: US Federal & State Dates

Last Updated: February 7, 2026

TL;DR – Quick Summary

Looking for a September 2026 calendar with holidays? This complete guide answers “what holidays are in September 2026” with detailed information on all federal, state, and cultural observances. September holidays 2026 include one federal holiday—Labor Day on Monday, September 7—along with numerous state observances and cultural celebrations across the United States. The September calendar 2026 with holidays features state-specific holidays like California Admission Day (September 9), First Responders Day in North Carolina (September 11), and Native American heritage celebrations (September 25-28). Federal offices, banks, and post offices close nationwide on Labor Day, while state-specific closures affect government services in California, North Carolina, Arizona, Texas, Delaware, Nevada, Montana, Michigan, Tennessee, and Ohio. The month also includes significant religious observances including Rosh Hashana (September 12) and Yom Kippur (September 21), plus national commemorations like Patriot Day (September 11).

September 2026 brings one federal holiday—Labor Day on September 7—alongside a rich tapestry of state celebrations, cultural observances, and traditional commemorations. Below is the complete September 2026 holiday schedule with federal and state-specific information, cultural observances, and planning considerations for families, businesses, and travelers. Understanding September holidays is essential for effective planning whether you’re coordinating work schedules, booking travel, or organizing family events.

Key Statistics & Facts for September 2026 Holidays

By the Numbers:

• 1 federal holiday in September 2026 (Labor Day on Monday, September 7)
• 8+ state holidays and observances across multiple states including California, North Carolina, Arizona, Texas, and others
• 2.9 million federal employees receiving paid time off on Labor Day
• All US banks and post offices closed on Monday, September 7 for the federal holiday
• Multiple Jewish holidays including Rosh Hashana (September 12) and Yom Kippur (September 21)
• Patriot Day on September 11 commemorating the 25th anniversary of the 9/11 attacks
• Native American heritage celebrations in the final week across multiple states
• 30 total days in September 2026, beginning on Tuesday, September 1 and ending on Wednesday, September 30

Key September Holidays 2026 Facts:
The September holidays calendar includes both widely observed federal holidays and unique state-specific celebrations, making it important to know which September holidays affect your area.

Official Sources & Authority:

• Federal holiday designated by the U.S. Office of Personnel Management
• State holidays designated by individual state legislatures
• Cultural and religious dates based on traditional calendars and authoritative sources
• Official calendar data from Time and Date for 2026 observances

 

Planning your September 2026 schedule? Understanding the various holidays in September 2026 is essential for coordinating travel plans, business operations, school schedules, and personal commitments. September holidays feature the federal Labor Day holiday, marking the traditional end of summer, alongside important cultural commemorations like Patriot Day and significant state observances celebrating admission anniversaries and first responders.

According to the U.S. Office of Personnel Management, Labor Day is one of eleven federal holidays observed annually, resulting in closures of federal offices, banks, and post offices nationwide on Monday, September 7, 2026. Beyond the federal observance, September 2026 showcases the diversity of American commemorations through state-specific holidays, religious observances, and cultural celebrations. This comprehensive guide covers all official holidays, observances, and significant dates occurring throughout the September calendar 2026 with holidays, based on data from Time and Date calendar resources and official government sources.

September 2026 Holiday Types: Quick Comparison

Holiday Type	Examples in September 2026	Who Gets Off?	What Closes?
Federal Holiday	Labor Day (Sept 7)	All federal employees, most banks	Federal offices, banks, post offices, stock markets
State Holidays	California Admission Day (Sept 9) First Responders Day – NC (Sept 11) Constitution Day – AZ (Sept 13)	State government employees in specific states only	State offices only in observing states
Religious Observances	Rosh Hashana (Sept 12-13) Yom Kippur (Sept 21)	Varies by employer and individual observance	Some schools and businesses in areas with large Jewish populations
Cultural/National Observances	Patriot Day (Sept 11) Native American Day (Sept 25)	No mandatory time off	No government closures; ceremonial recognition

Quick Reference: September 2026 Holidays Overview

Here’s your at-a-glance guide to all holidays and observances in September 2026:

Date	Holiday/Observance	Type	Affected Areas
September 7 (Mon)	Labor Day	Federal Holiday	All States
September 9 (Wed)	California Admission Day	State Holiday	California
September 11 (Fri)	Patriot Day	National Observance	All States
September 11 (Fri)	First Responders Day	State Legal Holiday	North Carolina
September 12 (Sat)	Rosh Hashana	Religious Observance	Jewish Communities / Texas (Optional)
September 12 (Sat)	Native American Day	State Observance	Delaware
September 13 (Sun)	Constitution Commemoration Day	State Holiday	Arizona
September 21 (Mon)	Yom Kippur	Religious Observance	Jewish Communities / Texas (Optional)
September 22 (Tue)	Emancipation Day	Local Observance	Ohio (Local)
September 25 (Fri)	Native American Day	State Observance	California, Nevada
September 25 (Fri)	American Indian Heritage Day	State Observance	Montana, Texas
September 25 (Fri)	Michigan Indian Day	State Observance	Michigan
September 26 (Sat)	Public Lands Day	State Observance	Wyoming
September 28 (Mon)	American Indian Day	State Observance	Tennessee

💡 Important Note: Labor Day is a federal holiday affecting all states—federal offices, banks, stock markets, and post offices close nationwide on September 7. State holidays only close government offices in the specific states listed. Private employers decide whether to observe federal or state holidays based on company policy.

Ideal For: HR managers coordinating federal holiday schedules, travelers planning early fall visits to California or Arizona during state celebrations, businesses scheduling around bank closures on Labor Day, families preparing for end-of-summer weekend activities, and organizations coordinating Patriot Day commemorations.

September 2026 Calendar with Holidays

Looking for a printable September 2026 calendar with holidays? September 2026 starts on Tuesday, September 1 and ends on Wednesday, September 30, with a total of 30 days. The month features one federal holiday (Labor Day on Monday, September 7) plus multiple state holidays and cultural observances throughout the month. This comprehensive September holidays calendar helps you plan ahead for all important dates.

Complete September 2026 Calendar Overview:

Week	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 1	1	2	3	4	5	6	7 Labor Day 🇺🇸
Week 2	8	9 CA Admission Day	10	11 Patriot Day NC First Responders	12 Rosh Hashana begins	13 Rosh Hashana AZ Constitution Day	14
Week 3	15	16	17	18	19	20 Yom Kippur begins	21 Yom Kippur
Week 4	22	23	24	25 Native American Day (CA, NV, MI, MT, TX)	26 WY Public Lands Day	27	28 TN American Indian Day
Week 5	29	30

🇺🇸 = Federal Holiday (nationwide closures)
State abbreviations indicate state-specific holidays

Key Calendar Facts:

• 30 days total in September 2026
• 1 federal holiday (Labor Day – September 7)
• 8 state holidays/observances across various states
• 2 major Jewish holidays (Rosh Hashana, Yom Kippur)
• First day: Tuesday, September 1, 2026
• Last day: Wednesday, September 30, 2026

Major Holidays in September 2026

What are the major holidays in September 2026? The primary holiday is Labor Day on Monday, September 7, a federal holiday observed nationwide with bank closures, federal office closures, and post office closures. Other significant September holidays include Patriot Day (September 11), Rosh Hashana (September 12-13), and Yom Kippur (September 21).

The Three Most Important September 2026 Holidays:

1. Labor Day – Monday, September 7, 2026

• Type: Federal Holiday
• Impact: Nationwide closures of banks, federal offices, post offices, and stock markets
• Significance: Honors American workers and the labor movement; marks the traditional end of summer
• Who Gets Off: All 2.9 million federal employees; many private employers also observe
• What to Expect: Heavy travel, Labor Day sales, end-of-summer celebrations

2. Patriot Day – Friday, September 11, 2026

• Type: National Day of Service and Remembrance
• Impact: No office closures; ceremonial observance
• Significance: 25th anniversary of the September 11, 2001 terrorist attacks
• Who Observes: Entire nation with moments of silence, memorial ceremonies, flag lowerings
• What to Expect: Ceremonies at Ground Zero, Pentagon, and Shanksville; tributes to 2,977 victims and 412 first responders who died

3. Rosh Hashana – September 12-13, 2026 (Saturday-Sunday)

• Type: Jewish High Holy Day
• Impact: Schools and businesses in areas with large Jewish populations may close or offer flexibility
• Significance: Jewish New Year 5787; begins Ten Days of Repentance
• Who Observes: Jewish communities worldwide; optional state holiday in Texas
• What to Expect: Synagogue services, family gatherings, traditional meals with apples and honey

What Holidays Are in September 2026?

Direct Answer: September 2026 contains one federal holiday (Labor Day on Monday, September 7) that closes banks, post offices, and federal offices nationwide, plus multiple state holidays including California Admission Day (September 9), First Responders Day in North Carolina (September 11), and various Native American heritage observances (September 25-28).

September 2026 features Labor Day as the sole federal holiday, alongside diverse state-specific holidays and numerous national and cultural observances. The month showcases American labor history, patriotic commemorations, and state pride celebrations, from California’s admission anniversary to widespread recognition of Native American heritage.

Complete List of September Holidays 2026:

Federal Holiday (Nationwide Closures)

Date	Holiday	Day of Week	Government Status	Month
September 7	Labor Day	Monday	Federal offices, banks, post offices closed	September 2026

What’s Open and Closed on Labor Day 2026

This quick-reference table helps you plan around Labor Day closures:

Service/Business Type	Status on September 7, 2026	Notes
Federal Government Offices	❌ CLOSED	Social Security, IRS, courts, passport offices
Banks & Credit Unions	❌ CLOSED	ATMs and online banking available
Post Offices (USPS)	❌ CLOSED	No mail delivery; resumes September 8
Stock Markets (NYSE, NASDAQ)	❌ CLOSED	No trading; reopens September 8
Public Schools	❌ CLOSED	Most schools observe Labor Day
Private Businesses	⚠️ VARIES	Many retail stores remain open
Grocery Stores	✅ OPEN	Regular or modified hours
Shopping Malls	✅ OPEN	Labor Day sales events
Hospitals & Urgent Care	✅ OPEN	Emergency services 24/7
Pharmacies	✅ OPEN	Most maintain regular hours
UPS Delivery	❌ CLOSED	No pickups or deliveries
FedEx Delivery	⚠️ MODIFIED	Some services closed
Public Transportation	✅ OPEN	Most cities run holiday schedules
National Parks	✅ OPEN	Busy holiday weekend
State DMV Offices	❌ CLOSED	All states observe Labor Day

State Holidays (Government Office Closures by State)

Date	Holiday	Day of Week	State(s)	Month
September 9	California Admission Day	Wednesday	California	September 2026
September 11	First Responders Day	Friday	North Carolina	September 2026
September 12	Rosh Hashana (Optional)	Saturday	Texas	September 2026
September 13	Constitution Commemoration Day	Sunday	Arizona	September 2026
September 21	Yom Kippur (Optional)	Monday	Texas	September 2026

State Observances (Recognition without Mandatory Closures)

Date	Observance	Day of Week	State(s)	Month
September 11	Patriot Day	Friday	Alaska	September 2026
September 12	Native American Day	Saturday	Delaware	September 2026
September 25	Native American Day	Friday	California, Nevada	September 2026
September 25	American Indian Heritage Day	Friday	Montana, Texas	September 2026
September 25	Michigan Indian Day	Friday	Michigan	September 2026
September 26	Public Lands Day	Saturday	Wyoming	September 2026
September 28	American Indian Day	Monday	Tennessee	September 2026

Local Observance (Not Statewide)

Date	Observance	Day of Week	Location	Month
September 22	Emancipation Day	Tuesday	Ohio (Local)	September 2026

Understanding Federal vs. State Holidays in September

What Makes a Federal Holiday?

Federal holidays are established by the United States Congress and apply to all federal employees nationwide. Labor Day, the only federal holiday in September 2026, was designated as a federal holiday in 1894 to honor American workers and the labor movement.

Federal Holiday Impact:

• All 50 states observe federal holidays
• Federal offices close including Social Security, IRS, federal courts
• Banks and post offices close nationwide
• Stock markets close (NYSE, NASDAQ, bond markets)
• 2.9 million federal employees receive paid time off
• Federal contractors typically observe federal holidays

State Holidays Explained

State holidays are designated by individual state legislatures and only affect government operations within that specific state. In September 2026, several states observe unique holidays celebrating their history, heritage, and values.

State Holiday Impact:

• State government offices close only in the observing state
• Schools may close depending on local district policy
• Private businesses decide whether to observe
• Banks remain open (unless federal holiday)
• Federal offices remain open in those states

Key Difference: If you work for the federal government in California, you get Labor Day off (federal holiday) but work on California Admission Day (state holiday). If you work for California state government, you get both days off.

Labor Day – September 7, 2026 (Monday)

Quick Answer: Labor Day 2026 falls on Monday, September 7, and is a federal holiday resulting in nationwide closures of all banks, post offices, federal offices, and stock markets, while most private businesses remain open with many hosting Labor Day sales.

Overview

Labor Day 2026 falls on Monday, September 7, marking the traditional end of summer and honoring the contributions of American workers. As a federal holiday, Labor Day results in nationwide closures of federal offices, banks, post offices, and stock markets.

History and Significance

Labor Day was created during the labor movement of the late 19th century and became a federal holiday in 1894. The holiday celebrates the economic and social contributions of workers and marks the unofficial end of summer for many Americans.

Historical Milestones:

• 1882: First Labor Day parade in New York City with 10,000 workers
• 1887: Oregon becomes first state to recognize Labor Day
• 1894: Congress designates Labor Day as a federal holiday
• Traditional Date: First Monday in September (since 1894)

What’s Closed on Labor Day 2026

Federal Closures:

• All federal government offices and agencies
• Federal courts (no hearings or filings)
• Social Security offices (no in-person services)
• IRS offices (tax assistance unavailable)
• Passport offices and post offices

Financial Services:

• All banks and credit unions (ATMs and online banking available)
• New York Stock Exchange (NYSE)
• NASDAQ stock market
• Bond markets
• Federal Reserve banks

Delivery Services:

• USPS: No mail delivery or post office services
• UPS: No pickups or deliveries for most services
• FedEx: Limited services, varies by location
• Amazon: Deliveries may be delayed

What Remains Open

Essential Services:

• Hospitals and emergency rooms
• Urgent care facilities
• Police and fire departments
• 911 emergency services

Most Private Businesses:

• Grocery stores (regular or modified hours)
• Gas stations
• Restaurants
• Hotels
• Shopping malls (many host Labor Day sales)
• Movie theaters
• Amusement parks

Transportation:

• Airlines operate normal schedules
• Amtrak runs regular service
• Public transit (may run on holiday schedules)
• Airports remain open

Labor Day Weekend Travel and Celebrations

Labor Day weekend (September 5-7, 2026) represents one of the busiest travel periods of the year, with millions of Americans taking end-of-summer trips.

Popular Activities:

• Beach and lake vacations: Last weekend before fall
• Barbecues and cookouts: Traditional family gatherings
• Labor Day sales: Major retail shopping events
• Sports events: College football season begins
• Parades: Labor celebrations in major cities
• State fairs: Many conclude Labor Day weekend

Travel Tips for September 2026:

• Book flights and hotels early for best rates
• Expect heavy traffic on highways Friday-Monday
• National parks extremely busy (consider alternatives)
• Labor Day sales peak Saturday-Monday
• Many summer attractions close after this weekend

State Holidays in September 2026: Detailed Breakdown

California Admission Day – September 9, 2026 (Wednesday)

Quick Answer: California Admission Day on September 9, 2026 is a state holiday in California, resulting in closures of state government offices, particularly in the state capital of Sacramento, while private businesses and banks remain open.

Overview: California Admission Day commemorates California’s admission to the Union as the 31st state on September 9, 1850, following the California Gold Rush and Mexican-American War.

Official Status:

• State holiday in California
• California state government offices closed statewide
• Schools vary by district policy
• Private businesses generally remain open

Where It’s Observed:
California Admission Day is most prominently celebrated in Sacramento, the state capital, where state government offices close for the day. Other significant observances occur in:

• San Francisco – Historical exhibits at California Historical Society
• Monterey – Site of California’s first constitutional convention (1849)
• Los Angeles – Museum programs on California statehood
• Sonoma – Bear Flag Revolt historic sites
• Columbia – Gold Rush town celebrations in the Sierra Nevada foothills

Historical Significance:
California entered the Union as a free state under the Compromise of 1850, bypassing the usual territorial phase due to rapid population growth during the Gold Rush. The state’s admission was politically significant, shifting the balance between free and slave states in the pre-Civil War era. Between 1848-1855, California’s population exploded from 15,000 to over 300,000 due to the Gold Rush.

2026 Observance in Sacramento and Statewide:

• State Capitol closure in Sacramento on Wednesday, September 9
• Educational programs in schools about California history and the Gold Rush
• California State Library hosts special Gold Rush exhibits
• Historical societies throughout the state feature special events
• Museums showcase early statehood exhibits and Gold Rush artifacts
• Sutter’s Fort (Sacramento) offers historical reenactments

Planning Considerations:

• California DMV offices closed statewide
• State courts closed
• State parks remain open with full services (popular destination for the day off)
• Private businesses operate normally
• Bank locations in California remain open (not a federal holiday)
• Sacramento government district quiet; plan alternative routes if needed

First Responders Day – September 11, 2026 (Friday)

Quick Answer: First Responders Day on September 11, 2026 is a state legal holiday in North Carolina, resulting in closures of state government offices throughout the state, including in Raleigh, Charlotte, and other major cities, while honoring all police, firefighters, and emergency medical personnel.

Overview: North Carolina observes First Responders Day on September 11 as a state legal holiday to honor police officers, firefighters, emergency medical personnel, and all first responders who protect public safety.

Official Status:

• State legal holiday in North Carolina
• North Carolina state government offices closed statewide
• Coincides with Patriot Day (September 11)
• Honors all first responders, past and present

Where Observed in North Carolina:
First Responders Day is observed throughout North Carolina with state government closures and ceremonies in major cities:

• Raleigh (State Capital) – State government offices close; ceremonies at State Capitol
• Charlotte – Charlotte Fire Department and CMPD host memorial services
• Greensboro – Community first responder appreciation events
• Durham – Educational programs and public safety open houses
• Winston-Salem – Fire station tributes and memorials
• Fayetteville – Military and civilian first responder joint ceremonies
• Asheville – Mountain region first responder recognition
• Wilmington – Coastal communities honor emergency personnel

Significance:
The September 11 date connects First Responders Day with the national remembrance of the 2001 terrorist attacks, when 412 first responders lost their lives at the World Trade Center, Pentagon, and Shanksville, Pennsylvania. North Carolina’s holiday recognizes the daily sacrifices of all emergency personnel, including the 23 North Carolina residents who died in the 9/11 attacks.

2026 Observance Activities:

• Ceremonies honoring fallen first responders at fire stations statewide
• Public safety demonstrations and open houses in Raleigh, Charlotte, and other cities
• Educational programs in North Carolina schools
• Memorial services at fire stations and police departments across the state
• Community appreciation events in all 100 counties
• Special recognition for families of fallen first responders

What’s Closed in North Carolina:

• All state government offices statewide
• North Carolina DMV locations throughout the state
• State courts and administrative offices
• Some schools (varies by district)
• State parks offices (parks remain open for visitors)

What Remains Open:

• Private businesses
• Banks (not a federal holiday)
• Emergency services (24/7 operations)
• Most retail and restaurants
• Federal offices in North Carolina

Constitution Commemoration Day – September 13, 2026 (Sunday)

Quick Answer: Arizona’s Constitution Commemoration Day falls on Sunday, September 13, 2026, recognizing the U.S. Constitution’s signing, with educational programs in Phoenix, Tucson, and throughout Arizona, though state offices are already closed for the weekend.

Overview: Arizona observes Constitution Commemoration Day on September 13 to celebrate the signing of the United States Constitution on September 17, 1787. When September 17 falls on a weekend, Arizona observes the holiday on the Sunday before.

Official Status:

• State holiday in Arizona
• Celebrates Constitution Week (September 17-23 annually)
• Educational focus on constitutional history and civics
• 2026: Observed Sunday, September 13 (actual date is Wednesday, September 17)

Where Observed in Arizona:
Constitution Commemoration Day is celebrated throughout Arizona with special focus on the state’s major cities and educational institutions:

• Phoenix (State Capital) – Arizona State Capitol Museum hosts constitutional exhibits; state offices already closed on Sunday
• Tucson – University of Arizona constitutional law programs; Arizona Historical Society events
• Mesa – Educational programs at schools and libraries
• Scottsdale – Constitution readings at civic centers
• Flagstaff – Northern Arizona University civic education events
• Tempe – Arizona State University constitutional symposiums
• Prescott – Historic courthouse constitutional programs
• Yuma – Border community civics celebrations

Historical Context:
The U.S. Constitution was signed in Philadelphia on September 17, 1787, establishing the framework for American government. Arizona, which became a state in 1912, recognizes this foundational document with educational programs and civic celebrations. Arizona’s own constitution is one of the most easily amended state constitutions in the nation.

2026 Observance:
Since the holiday falls on Sunday, September 13 in Arizona’s observance:

• State offices remain closed Sunday (normal weekend closure)
• Schools incorporate Constitution education during the week
• Libraries throughout Arizona host exhibits and programs
• Historical societies in Phoenix, Tucson, and other cities feature special events
• Naturalization ceremonies for new citizens held in federal courts
• Public readings of the Constitution at civic centers statewide

Educational Programs Across Arizona:

• Schools teach constitutional history and civics (during Constitution Week)
• Mock constitutional conventions in Phoenix-area schools
• Student debates on constitutional issues at universities
• Museum exhibits on the Founding Fathers in Tucson and Phoenix
• Guest speakers on constitutional law at Arizona colleges
• Arizona Historical Society special programming

Planning Considerations:

• State government offices closed Sunday (regular weekend)
• Educational programs peak during Constitution Week (September 17-23)
• Public libraries offer special constitutional programs
• Museums in Phoenix and Tucson feature temporary exhibits
• No impact on private businesses (Sunday observance)

Native American Heritage Observances – September 25-28

September 2026 features multiple state observances honoring Native American heritage, culture, and contributions across different days and states.

Native American Day – September 25 (California, Nevada)

Official Status:

• State observance in California
• State observance in Nevada
• Fourth Friday of September annually
• Schools and government offices typically remain open

Purpose:
Recognizes the rich cultures, histories, and contributions of Native American peoples and tribes indigenous to California and Nevada, including the Miwok, Pomo, Yurok, Paiute, Shoshone, Washoe, and hundreds of other tribes.

2026 Observance Activities:

• Powwows and cultural celebrations
• Traditional music and dance performances
• Native art exhibits and craft demonstrations
• Educational programs on tribal history
• Storytelling sessions with tribal elders
• Native food festivals featuring traditional cuisine

California Tribes Featured:

• Over 100 federally recognized tribes
• Largest Native American population of any state
• Rich diversity of languages and cultures
• Important historical sites and reservations

Nevada Tribes:

• Paiute, Shoshone, and Washoe peoples
• Pyramid Lake and Walker River Paiute Tribes
• Traditional lands spanning the Great Basin

American Indian Heritage Day – September 25 (Montana, Texas)

Official Status:

• State observance in Montana
• State observance in Texas
• Fourth Friday of September
• Recognition without mandatory closures

Montana Observance:
Montana has one of the highest percentages of Native American residents in the U.S., with seven reservations representing 12 tribal nations including the Blackfeet, Crow, Northern Cheyenne, and Salish and Kootenai peoples.

2026 Montana Activities:

• Tribal celebrations at reservations
• Museum of the Rockies special exhibits
• University cultural programs
• Traditional crafts demonstrations
• Native language preservation programs

Texas Observance:
Texas recognizes its indigenous heritage including the Caddo, Comanche, Apache, and numerous other tribes who inhabited the region for millennia.

2026 Texas Activities:

• Educational programs in schools
• Museum exhibits on Texas Native history
• Cultural celebrations in major cities
• Recognition of contemporary Native contributions

Michigan Indian Day – September 25 (Friday)

Official Status:

• State observance in Michigan
• Fourth Friday of September
• Honors Michigan’s Native peoples
• Educational focus in schools

Historical Significance:
Michigan is home to twelve federally recognized tribes including the Ojibwe (Chippewa), Odawa (Ottawa), and Potawatomi peoples, collectively known as the Three Fires Confederacy, as well as other tribes.

2026 Observance:

• Cultural events at tribal centers
• Educational programs featuring tribal history
• Traditional storytelling and music
• Native art exhibitions
• Pow wows and community gatherings

Public Lands Day – September 26 (Wyoming)

Official Status:

• State observance in Wyoming
• Fourth Saturday of September
• Celebrates public land conservation
• Volunteer service opportunities

Significance:
Wyoming observes Public Lands Day to recognize the importance of conservation and public access to natural resources. With vast federal lands including Yellowstone National Park (first national park) and Grand Teton National Park, Wyoming has deep ties to the public lands movement.

2026 Activities:

• Volunteer trail maintenance projects
• Educational programs on conservation
• Guided nature walks and hikes
• Wildlife viewing programs
• Public lands clean-up events

American Indian Day – September 28 (Tennessee)

Official Status:

• State observance in Tennessee
• Fourth Monday of September
• Honors Native American heritage
• Educational recognition

Historical Context:
Tennessee was home to the Cherokee Nation before forced removal via the Trail of Tears in 1838-1839. The state recognizes this history and honors Native contributions.

2026 Observance:

• Educational programs on Cherokee history
• Recognition of contemporary Native communities
• Museum exhibits and cultural programs
• Trail of Tears commemorations

Local Observances and Regional Celebrations

Beyond federal and state holidays, September 2026 features numerous local observances and regional celebrations that reflect the diverse cultural heritage of American communities.

Emancipation Day – September 22 (Ohio – Local)

Quick Answer: Emancipation Day on September 22, 2026 is a local observance in specific communities within Ohio, commemorating the end of slavery, though not a statewide holiday with government closures.

Where Observed:

• Specific counties and municipalities in Ohio
• Not observed statewide
• Local community celebrations and educational programs
• No government office closures

Significance:
While the Emancipation Proclamation was issued on January 1, 1863, different communities celebrate emancipation on various dates. Ohio communities use September 22 to mark preliminary emancipation announcements and celebrate African American freedom and heritage.

2026 Local Activities:

• Community gatherings and cultural festivals
• Educational programs in local schools
• Historical society presentations
• Church services and celebrations
• African American heritage exhibits

Regional September Celebrations Across the United States

California Wine Country Harvest Season (Throughout September)

• Location: Napa Valley, Sonoma County, Paso Robles
• Activities: Grape harvest celebrations, wine festivals, vineyard tours
• Peak Tourism: Mid-to-late September

State Fair Conclusions (Labor Day Weekend)

• Minnesota State Fair (St. Paul) – Concludes Labor Day
• Wisconsin State Fair (West Allis) – Often extends through Labor Day weekend
• New Mexico State Fair (Albuquerque) – Runs through mid-September
• North Carolina State Fair (Raleigh) – May begin late September

Coastal Celebrations

• Seafood Festivals: Multiple coastal communities (Maine lobster, Carolina shrimp, Pacific Northwest salmon)
• Beach Towns: End-of-season celebrations in Atlantic City, Ocean City, Virginia Beach, Santa Monica
• Gulf Coast: Shrimp festivals in Louisiana and Texas

Mountain Communities

• Aspen, Colorado: Music and arts festivals
• Jackson Hole, Wyoming: Fall arts festivals
• Asheville, North Carolina: Mountain heritage celebrations
• Vermont: Early fall foliage viewing begins late September

Urban September Events

• New York City: Broadway season begins; Fashion Week (early September)
• San Francisco: Fleet Week preparations begin
• Chicago: Jazz Festival (Labor Day weekend)
• Austin, Texas: ACL Music Festival (late September)
• Boston: Head of the Charles Regatta preparations

Native American Powwows and Cultural Events

Throughout September 2026, numerous Native American communities across the United States host powwows and cultural celebrations, particularly around Native American Day observances:

Major September Powwows:

• California: Multiple powwows in Los Angeles, San Diego, Sacramento areas
• Montana: Crow Fair (early September) – one of largest powwows in North America
• New Mexico: Santa Fe Indian Market events
• Oklahoma: Various tribal celebrations
• South Dakota: Tribal powwows on reservations
• Arizona: Native American festivals

Planning Tips for Regional Celebrations:

• Check local tourism boards for specific dates and locations
• Book accommodations early for popular festivals
• Many events are free and family-friendly
• Support local Native American artists and craftspeople
• Respect cultural protocols and sacred ceremonies

Patriot Day 2026 – September 11 (Friday)

Quick Answer: Patriot Day on September 11, 2026 marks the 25th anniversary of the 2001 terrorist attacks, observed nationwide as a day of service and remembrance with flags at half-staff, moments of silence, and ceremonies at Ground Zero, the Pentagon, and Shanksville, though not a federal holiday with office closures.

National Day of Remembrance

Patriot Day on September 11, 2026, marks the 25th anniversary of the terrorist attacks on September 11, 2001. While not a federal holiday with office closures, Patriot Day is a national day of service and remembrance observed across all 50 states.

Official Status:

• National day of observance (not a federal holiday)
• No closures of government offices or businesses
• Flags flown at half-staff
• Moment of silence observed nationwide
• State observance in Alaska

September 11, 2001 – What Happened:
On the morning of September 11, 2001, 19 terrorists hijacked four commercial airplanes, crashing two into the World Trade Center towers in New York City, one into the Pentagon near Washington D.C., and one into a field in Shanksville, Pennsylvania after passengers fought back.

Total Lives Lost:

• 2,977 people killed in the attacks
• 412 first responders (firefighters, police, paramedics)
• Citizens from over 90 countries
• Thousands more injured
• Long-term health effects continue for survivors and responders

2026 – 25th Anniversary Observance:

The 25th anniversary in 2026 will feature special commemorations:

National Observances:

• Presidential proclamation and moment of silence at 8:46 AM EDT (first impact time)
• Ceremonies at the 9/11 Memorial & Museum in New York City
• Pentagon Memorial ceremony in Arlington, Virginia
• Flight 93 National Memorial ceremony in Shanksville, Pennsylvania
• Reading of victims’ names at Ground Zero
• Tribute in Light memorial (twin light beams in NYC)

Community Observances:

• Schools teach lessons on 9/11 history and impact
• Fire stations and police departments hold memorial services
• Community service projects (“Day of Service and Remembrance”)
• Flags flown at half-staff on all government buildings
• Bells tolled at times of attacks
• Candlelight vigils in communities nationwide

Alaska’s Special Observance:
Alaska designates Patriot Day as a formal state observance with recognition in government proceedings and educational programs.

Planning Considerations:

• Many ceremonies begin early morning (attack times)
• Heavy security at memorial sites
• Media coverage of anniversary events
• Schools incorporate 9/11 education
• First responders honored in communities nationwide
• Travel may be affected near memorial sites

Religious and Cultural Observances in September 2026

Jewish High Holy Days

September 2026 includes the most sacred period in the Jewish calendar, beginning with Rosh Hashana and culminating in Yom Kippur.

Rosh Hashana – September 12-13, 2026 (Saturday-Sunday)

Overview: Rosh Hashana, the Jewish New Year, marks the beginning of the High Holy Days and is observed for two days.

Official Status:

• Religious observance (not a federal holiday)
• State holiday in Texas (optional for state employees)
• Schools in areas with large Jewish populations may close
• Businesses owned by Jewish families typically close

Religious Significance:
Rosh Hashana (Hebrew for “head of the year”) celebrates the Jewish New Year 5787 and commemorates the creation of the world. It begins the Ten Days of Repentance leading to Yom Kippur.

Traditional Observances:

• Synagogue services featuring the blowing of the shofar (ram’s horn)
• Family gatherings and festive meals
• Eating apples dipped in honey (symbolizing sweet new year)
• Round challah bread (symbolizing the cycle of the year)
• Tashlich ceremony (casting away sins into flowing water)
• Reflection and prayer

2026 Timing:

• Begins at sunset Friday, September 11
• Continues through sunset Sunday, September 13
• Services typically 3-5 hours on both days

Yom Kippur – September 21, 2026 (Monday)

Overview: Yom Kippur, the Day of Atonement, is the holiest day in the Jewish calendar and concludes the Ten Days of Repentance.

Official Status:

• Religious observance (not a federal holiday)
• State holiday in Texas (optional for state employees)
• Many schools in areas with Jewish populations close
• Major impact on businesses in heavily Jewish areas

Religious Significance:
Yom Kippur is dedicated to atonement and repentance. Jews seek forgiveness from God and from those they have wronged during the past year. It is observed with a 25-hour fast and intensive prayer.

Traditional Observances:

• 25-hour fast (from sunset Sunday to nightfall Monday)
• All-day synagogue services
• Kol Nidre service (evening before)
• Neilah (closing service at sunset)
• White clothing symbolizing purity
• Abstention from work, eating, drinking, bathing
• Prayers for forgiveness and spiritual renewal

2026 Timing:

• Begins sunset Sunday, September 20
• Concludes nightfall Monday, September 21
• Services span nearly 24 hours

Community Impact:
In areas with significant Jewish populations (New York, New Jersey, Florida, California, Illinois), many businesses close, and traffic patterns change noticeably on Yom Kippur.

How September 2026 Holidays Affect Various Sectors

Government Services

Federal Government:

• Closed September 7 (Labor Day): All federal offices, courts, agencies
• Open all other days: Normal operations for state holidays

State Government:
Each state’s government offices close only for their own state holidays:

• California: Closed September 9 (Admission Day) and September 7 (Labor Day)
• North Carolina: Closed September 11 (First Responders Day) and September 7 (Labor Day)
• Arizona: Closed September 7 (Labor Day); September 13 is Sunday
• All other states: Closed only for Labor Day (September 7)

Banking and Financial Services

Banks:

• Closed nationwide: September 7 (Labor Day – federal holiday)
• Open on all state holidays: Banks observe only federal holidays
• ATMs and online banking: Available 24/7
• Credit unions: Follow same schedule as banks

Stock Markets:

• Closed: Monday, September 7 (Labor Day)
• Open: All other business days
• Bond markets: Closed September 7

Postal and Shipping Services

USPS:

• No service September 7: No mail delivery or post office hours
• Normal service all other days: Including state holidays

Private Carriers:

• UPS: Closed September 7; normal service other days
• FedEx: Limited services September 7; varies by service type
• Amazon: Deliveries may be delayed September 7

Schools and Education

Public Schools:

• Closed Labor Day: Nearly all schools nationwide
• State holidays vary: Local school districts decide
• Back-to-school: Most schools already in session by early September
• Fall break: Some districts have extended weekends

Colleges and Universities:

• Labor Day: Most observe with campus closures
• Classes in session: Semester well underway
• September 11: Special commemorative events on campus

Retail and Hospitality

Retail Stores:

• Labor Day sales: Major shopping events throughout weekend
• Malls open: Extended hours for Labor Day sales
• Most stores open: Including grocery, pharmacy, gas stations

Restaurants and Hospitality:

• Open on holidays: Restaurants typically operate normally
• Hotels busy: Labor Day weekend heavy travel period
• Special promotions: End-of-summer dining events

Healthcare

Medical Services:

• Emergency rooms: Open 24/7 all days
• Urgent care: Most locations open with holiday hours
• Routine appointments: Limited availability September 7
• Pharmacies: Most major chains remain open

Travel and Transportation

Airlines:

• Peak travel: Labor Day weekend (September 5-7)
• Book early: High demand and prices
• Busy airports: Expect crowds Friday-Monday

Public Transit:

• Holiday schedules: Many systems run reduced service September 7
• Check locally: Varies by city and system

Highways:

• Heavy traffic: Labor Day weekend exodus from cities
• Worst times: Friday afternoon, Monday evening
• Plan accordingly: Leave early or late to avoid congestion

Planning Around September 2026 Holidays

Strategic Planning for September Holidays:

Understanding when September holidays occur and how they impact different sectors is crucial for effective planning. Here’s how to prepare for all September holidays in 2026.

For Businesses

Labor Day Planning:

• Determine whether to close or remain open September 7
• Communicate holiday schedule to customers in advance
• Plan staffing for holiday pay requirements
• Consider hosting Labor Day sales promotions
• Prepare for reduced business hours if staying open

State Holiday Considerations:

• Businesses in states with September holidays should communicate any closures
• Coordinate with vendors and clients in different states
• Plan around government office closures for permits, licenses
• Consider cultural sensitivity for religious observances

September Holidays Calendar Planning:

• Labor Day marks traditional end of summer business season
• September historically strong for business after summer slowdown
• Plan Q4 strategies and goal-setting
• Prepare for upcoming holiday season planning
• Review September holidays impact on quarterly targets

For Families

Labor Day Weekend Activities:

• Book travel accommodations early (peak travel period)
• Plan end-of-summer celebrations and gatherings
• Take advantage of Labor Day sales for back-to-school items
• Visit beaches, pools, amusement parks before seasonal closures
• Attend local festivals and community events
• Make the most of this important September holidays weekend

School Considerations:

• Children typically back in school early September
• Labor Day weekend often last big family trip before school routine
• Use three-day weekend for family bonding
• Prepare for fall routines and activities
• Check school calendar for September holidays closures

Religious Observance Planning:

• Jewish families should plan for Rosh Hashana (September 12-13)
• Yom Kippur (September 21) requires fasting and synagogue attendance
• Many Jewish families take time off work for High Holy Days
• Coordinate family gatherings and holiday meals
• These September holidays are important for religious observance

For Travelers

Best Times to Visit:

Labor Day Weekend (September 5-7):

• ❌ Avoid: Busy airports, highways, hotels
• ✅ Consider: Extended weekend trips, beach destinations
• 💰 Pricing: High costs for flights, hotels, rental cars
• ⚠️ Crowds: National parks, beaches, popular destinations packed

Mid-September (September 8-25):

• ✅ Ideal: Shoulder season with fewer crowds
• 💰 Pricing: Lower rates after Labor Day
• 🌡️ Weather: Pleasant temperatures nationwide
• 🍂 Activities: Early fall foliage in northern states
• 📅 September Holidays: Plan around Patriot Day (Sept 11) commemorations

Late September (September 26-30):

• ✅ Great value: Continued low prices
• 🍂 Fall colors: Peak season beginning in some regions
• 🌡️ Weather: Cooler temperatures, comfortable
• ⚠️ Note: Some summer attractions may close

State-Specific Travel:

California (September 9 – Admission Day):

• State offices closed Wednesday
• Good time to explore Gold Rush country
• Visit Sacramento historic sites
• Museums may have special exhibits
• Part of September holidays calendar

North Carolina (September 11 – First Responders Day):

• Patriot Day commemorations statewide
• Visit 9/11 memorials and tributes
• State government offices closed Friday
• Important day in September holidays observances

Arizona (September 13 – Constitution Commemoration Day):

• Educational programs on Constitution
• Visit state capitol and museums
• Constitutional heritage tours
• Celebrate September holidays with civic programs

For HR and Payroll Professionals

Labor Day (Federal Holiday):

• All non-exempt federal employees receive holiday pay
• Federal contractors typically observe
• Private employers decide observance (no legal requirement)
• Overtime rules apply for non-exempt employees working the holiday

State Holidays:

• Only affect state government employees in observing states
• Private employers not required to observe
• Company policy determines paid time off
• Communicate policies clearly to employees

Religious Accommodations:

• Employees may request time off for Rosh Hashana and Yom Kippur
• Reasonable accommodation required under Title VII
• Allow flexible scheduling when possible
• Advance notice helps with planning coverage

FAQ About September 2026 Holidays

Common questions about September holidays answered:

General Questions

Q: Are there any holidays in September 2026?
A: Yes, September 2026 has one federal holiday (Labor Day on Monday, September 7) plus multiple state holidays including California Admission Day (September 9), First Responders Day in North Carolina (September 11), and several Native American heritage observances in various states (September 25-28).

Q: Any holidays in September 2026 besides Labor Day?
A: Yes, while Labor Day is the only federal holiday in September 2026, there are numerous other observances: state holidays in California (Admission Day – Sept 9), North Carolina (First Responders Day – Sept 11), and Arizona (Constitution Commemoration Day – Sept 13); religious observances including Rosh Hashana (Sept 12-13) and Yom Kippur (Sept 21); and national commemorations like Patriot Day (Sept 11). Additionally, multiple states observe Native American heritage days between September 25-28.

Q: When is Labor Day 2026?
A: Labor Day 2026 is Monday, September 7. It always falls on the first Monday of September.

Q: Is Labor Day a three-day weekend?
A: Yes, Labor Day always creates a three-day weekend since it falls on Monday. The 2026 Labor Day weekend runs Saturday, September 5 through Monday, September 7.

Q: What is the September 2026 calendar with holidays?
A: The September calendar 2026 with holidays includes Labor Day (September 7), California Admission Day (September 9), Patriot Day (September 11), First Responders Day in NC (September 11), Rosh Hashana (September 12), Constitution Commemoration Day in AZ (September 13), Yom Kippur (September 21), and multiple Native American heritage observances (September 25-28).

Q: How many federal holidays are in September 2026?
A: There is one federal holiday in September 2026: Labor Day on Monday, September 7.

Q: What day of the week is Labor Day 2026?
A: Labor Day 2026 falls on Monday, September 7, creating a three-day weekend (Saturday, September 5 through Monday, September 7).

Labor Day Questions

Q: Are banks open on Labor Day 2026?
A: No, all banks are closed on Labor Day (Monday, September 7, 2026) because it is a federal holiday. ATMs and online banking remain available.

Q: Is the post office open on Labor Day?
A: No, all USPS post offices are closed on Labor Day with no mail delivery. Service resumes Tuesday, September 8.

Q: Do I have to work on Labor Day?
A: It depends on your employer. Federal employees and most government workers get the day off. Private employers are not legally required to close or provide paid time off for Labor Day, though many do as a company benefit.

Q: Is Labor Day time and a half?
A: Federal law does not require premium pay for working on Labor Day. However, many employers voluntarily provide holiday pay (time-and-a-half or double-time) as a benefit. Check your company’s holiday pay policy.

Q: Are schools closed for Labor Day?
A: Yes, nearly all public and private schools across the United States are closed for Labor Day.

State Holiday Questions

Q: Is California Admission Day a paid holiday?
A: California Admission Day is a state holiday for California state government employees, who typically receive paid time off. Private employers in California are not required to observe the holiday or provide paid time off.

Q: What states recognize First Responders Day?
A: North Carolina observes First Responders Day as a state legal holiday on September 11, 2026. Other states may have similar observances on different dates or without official holiday status.

Q: When is Native American Day 2026?
A: Native American Day 2026 falls on Friday, September 25 in California and Nevada. Other states observe similar holidays on different dates: Michigan (Michigan Indian Day, September 25), Montana and Texas (American Indian Heritage Day, September 25), Tennessee (American Indian Day, September 28), and Delaware (September 12).

Religious and Cultural Questions

Q: When is Rosh Hashana 2026?
A: Rosh Hashana 2026 begins at sunset on Friday, September 11 and continues through sunset on Sunday, September 13.

Q: When is Yom Kippur 2026?
A: Yom Kippur 2026 begins at sunset on Sunday, September 20 and concludes at nightfall on Monday, September 21.

Q: Is Rosh Hashana a federal holiday?
A: No, Rosh Hashana is not a federal holiday. However, it is recognized as an optional state holiday for state employees in Texas, and many schools and businesses in areas with significant Jewish populations may close or offer flexibility for observance.

Q: What is Patriot Day?
A: Patriot Day, observed on September 11, commemorates the victims of the terrorist attacks on September 11, 2001. It is a national day of service and remembrance, but not a federal holiday with office closures. 2026 marks the 25th anniversary of the attacks.

Travel and Planning Questions

Q: Is Labor Day weekend busy for travel?
A: Yes, Labor Day weekend is one of the busiest travel periods of the year. Millions of Americans travel for end-of-summer trips, resulting in crowded airports, highways, hotels, and tourist destinations. Book accommodations early and expect higher prices.

Q: When should I travel to avoid Labor Day crowds?
A: To avoid crowds, travel mid-week before Labor Day (Tuesday-Thursday, September 1-3) or wait until after the holiday (Tuesday, September 8 onward). The busiest days are Friday, September 5 through Monday, September 7.

Q: Are national parks open on Labor Day?
A: Yes, all national parks remain open on Labor Day, but expect extremely large crowds. This is one of the busiest weekends of the year for parks. Consider visiting on weekdays or after Labor Day for a better experience.

Q: What are the best September 2026 holidays for family trips?
A: Labor Day weekend (September 5-7) offers the three-day weekend advantage but comes with crowds. For better value and smaller crowds, consider mid-to-late September (after Labor Day through September 30) when prices drop and attractions are less busy.

Business Questions

Q: Do businesses have to close for Labor Day?
A: No, private businesses are not legally required to close for Labor Day or any federal holiday. Many retailers, restaurants, and service businesses remain open. However, many companies choose to close as a benefit to employees.

Q: Are stock markets closed on Labor Day?
A: Yes, both the New York Stock Exchange (NYSE) and NASDAQ are closed on Labor Day (Monday, September 7, 2026).

Q: Can I get a passport on Labor Day?
A: No, all passport offices are closed on Labor Day because it is a federal holiday. Passport services resume on Tuesday, September 8.

Q: Does Labor Day affect my court date?
A: If you have a federal court date scheduled for Monday, September 7, 2026, it will be rescheduled because all federal courts are closed for Labor Day. Check with your local court for state court schedules.

Key Takeaways for September Holidays 2026

September 2026 presents one federal holiday and diverse state observances:

1. Labor Day (September 7) – The only federal holiday, resulting in nationwide closures of federal offices, banks, post offices, and stock markets. This three-day weekend marks the traditional end of summer and is the most important of all September holidays.
2. State Celebrations – California (Admission Day), North Carolina (First Responders Day), Arizona (Constitution Commemoration Day), and Texas (optional Jewish holidays) observe state-specific holidays with varying impacts throughout the September holidays calendar.
3. Native American Heritage – Multiple states honor Native American peoples and cultures throughout the month, particularly September 25-28, with observances in California, Nevada, Montana, Texas, Michigan, Tennessee, and Delaware as part of September holidays traditions.
4. Patriot Day (September 11) – The 25th anniversary of the 9/11 attacks brings nationwide commemorations and remembrance ceremonies, though not a federal holiday with closures. This is one of the most significant September holidays for national reflection.
5. Jewish High Holy Days – Rosh Hashana (September 12-13) and Yom Kippur (September 21) represent the most sacred period in the Jewish calendar, significantly impacting schools and businesses in areas with Jewish populations, making them important September holidays to recognize.
6. Travel Peak – Labor Day weekend is one of the busiest travel periods of the year. Plan ahead, book early, and expect crowds and higher prices during this key September holidays weekend.
7. Business Planning – Private employers decide whether to observe Labor Day and state holidays. Communicate schedules clearly to customers and employees, especially regarding September holidays observances.
8. Educational Focus – Schools incorporate lessons on American labor history (Labor Day), 9/11 remembrance (Patriot Day), and constitutional government (Constitution Week) during September holidays programming.

Related Holiday Guides and Resources

Planning Beyond September? Explore our comprehensive guides to holidays throughout 2026:

2026 Monthly Holiday Guides:

• October 2026 Holidays – Columbus Day, Indigenous Peoples’ Day, Halloween, Alaska Day, Nevada Day
• August 2026 Holidays – Summer holidays and observances
• July 2026 Holidays – Independence Day and summer celebrations
• November 2026 Holidays – Veterans Day, Thanksgiving, and fall observances
• December 2026 Holidays – Christmas, Hanukkah, and winter holidays

Year-Round Planning Resources:

• 2026 Federal Holidays Calendar – All 11 federal holidays
• 2026 Printable Calendars – Free downloadable calendars
• State-Specific Holiday Calendars – Your state’s unique observances

Special Interest Guides:

• Labor Day History and Traditions – In-depth Labor Day guide
• Native American Heritage Month – November celebrations

The September 2026 calendar with holidays showcases both national unity through Labor Day and regional diversity through state-specific celebrations. Whether you’re planning family travel during the Labor Day weekend, coordinating business operations around federal and state closures, observing religious traditions during the High Holy Days, or participating in Patriot Day remembrances, understanding these September holidays helps you make informed decisions and plan effectively.

Labor Day on Monday, September 7 serves as the cornerstone of September holidays 2026, offering Americans a final summer celebration while honoring the contributions of workers who built our nation. State holidays like California Admission Day and First Responders Day reflect regional histories and values, while Native American heritage observances across multiple states recognize the diverse indigenous cultures that preceded European settlement. These varied September holidays demonstrate the rich tapestry of American commemorations.

As we approach the 25th anniversary of September 11, 2001, Patriot Day takes on special significance among September holidays in 2026, reminding us of our resilience and unity in the face of tragedy while honoring the first responders who continue to protect our communities daily.

Whether you’re asking “are there any holidays in September 2026?” or specifically searching for the “September calendar 2026 with holidays,” this guide provides comprehensive information to help you navigate the month’s observances, plan your schedule, and participate meaningfully in these important American traditions. From federal September holidays to state-specific observances and cultural celebrations, this complete resource covers all the important dates you need to know.Ready to Plan Your September 2026? Bookmark this guide and share it with colleagues, family, and friends to help everyone stay informed about holidays in September 2026. For the most current information on federal holidays, visit the U.S. Office of Personnel Management. For state-specific holiday information, consult your state government’s official website or Time and Date for comprehensive calendar data.