The September 2026 calendar spans 30 days, from Tuesday, September 1, 2026, to Wednesday, September 30, 2026, and includes four federal-adjacent observances, two Jewish High Holy Days, the opening of the UN General Assembly, and more than 200 recognized national days.
The month opens with the Labor Day Holiday on Monday, September 7, 2026, and closes with World Maritime Day on Wednesday, September 30, 2026.
Between those dates, the September 2026 calendar carries the 25th anniversary of the September 11 attacks, the start of Hispanic Heritage Month, the astronomical beginning of autumn, and the opening of the 81st session of the United Nations General Assembly.
This guide lists every major date in full, states which observances carry paid time off and which do not, and organizes the remaining national days, awareness campaigns, and global events by week.
Table of Contents
What’s Happening in September 2026
September 2026 holidays include Labor Day (September 7), the 25th anniversary of 9/11 (September 11), Rosh Hashanah (September 11–13), Constitution Day (September 17), Yom Kippur (September 20–21), and the autumn equinox (September 22).
Hispanic Heritage Month begins September 15.
The table below lists the highest-searched dates on the September 2026 calendar in chronological order.
| Date (Full) | Event | Category |
|---|---|---|
| Monday, September 7, 2026 | Labor Day (USA) | Federal holiday |
| Tuesday, September 8, 2026 | International Literacy Day; UNGA 81 opens | International / UN |
| Thursday, September 10, 2026 | World Suicide Prevention Day | International |
| Friday, September 11, 2026 | Patriot Day (25th anniversary of 9/11); Rosh Hashanah begins at sundown | Federal observance / Religious |
| Sunday, September 13, 2026 | Rosh Hashanah ends; Grandparents Day (USA) | Religious / Observance |
| Tuesday, September 15, 2026 | Hispanic Heritage Month begins | Cultural observance |
| Wednesday, September 16, 2026 | Mexican Independence Day | National (Mexico) |
| Thursday, September 17, 2026 | Constitution Day and Citizenship Day | Federal observance |
| Saturday, September 19, 2026 | Oktoberfest opens (Munich) | Global event |
| Sunday, September 20, 2026 | Yom Kippur begins at sundown | Religious |
| Monday, September 21, 2026 | Yom Kippur ends; International Day of Peace | Religious / International |
| Tuesday, September 22, 2026 | Autumn equinox; UNGA high-level debate opens | Astronomical / International |
September 2026 Calendar Overview
The September 2026 calendar begins on a Tuesday and ends on a Wednesday, giving the month four full weekends and 22 weekdays. September 2026 has 30 days, 22 weekdays, and 8 weekend days, and it falls entirely within the third fiscal quarter (Q3) for calendar-year businesses.
Key Dates on the September 2026 Calendar at a Glance
The September 2026 calendar assigns each date to a fixed day of the week that does not shift regardless of time zone, unlike lunar-based observances such as Rosh Hashanah.
The table below maps every Sunday, Monday, and Friday in the month, since these three weekdays carry the highest concentration of scheduled holidays and weekly observances.
| Weekday | Dates in September 2026 |
|---|---|
| Sunday | 6, 13, 20, 27 |
| Monday | 7, 14, 21, 28 |
| Tuesday | 1, 8, 15, 22, 29 |
| Wednesday | 2, 9, 16, 23, 30 |
| Thursday | 3, 10, 17, 24 |
| Friday | 4, 11, 18, 25 |
| Saturday | 5, 12, 19, 26 |
Labor Day always lands on the first Monday of September, which places it on September 7, 2026. Grandparents Day always lands on the first Sunday after Labor Day, which places it on September 13, 2026.
National Voter Registration Day always lands on the fourth Tuesday of September, which places it on September 22, 2026.
Printable and Digital September 2026 Calendar Formats
A printable September 2026 calendar typically renders as a single-page grid with 30 date cells arranged across five rows, starting the week on either Sunday or Monday depending on regional convention. US-format printable calendars start the week on Sunday, placing September 1 in the third column of the first row; UK, EU, and ISO-8601 formats start the week on Monday, placing September 1 in the first column of the first row. Free downloadable formats generally come as PDF (for print), PNG or JPG (for digital wallpaper), and ICS (for direct import into Google Calendar, Outlook, or Apple Calendar). An ICS file differs from a PDF or image file in that it carries machine-readable date and event data, so importing one auto-populates a calendar app with each date rather than requiring manual entry.
Federal, Religious, and International Observances on the September 2026 Calendar Compared
Not every date on the September 2026 calendar carries the same legal or practical weight. Federal holidays close government offices and suspend mail delivery; religious and cultural observances do not, unless a school district or employer grants separate accommodation. The table below compares the four observance categories that appear on the month’s calendar.
| Category | Determined By | Government Offices / Banks / Mail | Example on the September 2026 Calendar |
|---|---|---|---|
| Federal holiday | Fixed US federal law (Monday-based) | Closed | Labor Day, Monday, September 7, 2026 |
| Federal observance (non-holiday) | Congressional resolution or presidential proclamation | Open | Patriot Day, Friday, September 11, 2026; Constitution Day, Thursday, September 17, 2026 |
| Religious observance | Hebrew lunisolar calendar | Open (federal); many private employers and schools grant leave | Rosh Hashanah, Friday–Sunday, September 11–13, 2026; Yom Kippur, Sunday–Monday, September 20–21, 2026 |
| International/UN observance day | UN General Assembly resolution | Open | International Day of Peace, Monday, September 21, 2026 |
Federal and Public Holidays in September 2026
September 2026 contains one federal holiday with mandatory government closures and two federal observances without closures. This distinction answers the most frequently searched question about the month: which September dates actually come with paid time off.
Labor Day 2026 — Monday, September 7, 2026
Labor Day 2026 falls on Monday, September 7, 2026, because federal law fixes it as the first Monday in September every year. Labor Day is one of 11 federal holidays, meaning federal offices, the US Postal Service, and most banks close, and the stock market (NYSE and Nasdaq) does not trade.
Public schools that follow a standard academic calendar are closed, and many private-sector employers observe it as a paid holiday under company policy rather than legal mandate — private employers are not required by federal law to give Labor Day off.
The holiday also marks the unofficial end of summer in US cultural convention, though the astronomical and meteorological seasons do not change until later in the month.
Patriot Day and the 25th Anniversary of September 11, 2026
Patriot Day falls on Friday, September 11, 2026, and marks the 25th anniversary of the September 11, 2001, terrorist attacks. Patriot Day is not a federal holiday; it is a federal observance established by a 2001 joint congressional resolution, which means it carries no mandatory office closures.
The National Day of Service and Remembrance runs alongside Patriot Day on the same date, encouraging volunteer activity rather than time off. Standard observance protocol calls for the US flag to be flown at half-staff and for a national moment of silence at 8:46 a.m.
Eastern Time, marking the time the first hijacked aircraft struck the World Trade Center in 2001. Because 2026 marks the 25-year milestone, several US cities have confirmed expanded memorial programming for this date beyond the standard annual observance.
Is September 11 a Federal Holiday? Bank, School, and Mail Status on the September 2026 Calendar
September 11 is not a federal holiday on the September 2026 calendar. Banks remain open, the US Postal Service delivers mail on its normal Friday schedule, and federal offices operate under standard hours.
Public schools are typically in session, though many hold moment-of-silence observances or curriculum-based programming rather than closing.
Constitution Day and Citizenship Day — Thursday, September 17, 2026
Constitution Day and Citizenship Day fall on Thursday, September 17, 2026, commemorating the September 17, 1787, signing of the US Constitution.
Like Patriot Day, this date is a federal observance rather than a federal holiday, so it carries no closures. Federal law under 36 U.S.C. § 106 requires that any educational institution receiving federal funding provide educational programming about the Constitution on or near this date, making it one of the few US observances with a specific legal compliance requirement attached rather than a purely symbolic designation.
Constitution Week runs from Thursday, September 17, through Wednesday, September 23, 2026.
Religious and Cultural Observances in September 2026
September 2026 contains two Jewish High Holy Days and the opening of a month-long cultural heritage observance, in addition to several smaller faith-specific dates.
Rosh Hashanah 2026 — Friday, September 11, through Sunday, September 13, 2026
Rosh Hashanah, the Jewish New Year, begins at sundown on Friday, September 11, 2026, and continues through nightfall on Sunday, September 13, 2026, marking the start of the Hebrew year 5787 (according to Hebcal and Chabad.org).
The observance falls on the first two days of Tishrei, the seventh month of the Hebrew calendar, and opens the Ten Days of Repentance that conclude with Yom Kippur.
Because the Hebrew calendar prohibits Rosh Hashanah from beginning on a Sunday, Wednesday, or Friday sunset transitioning into those specific weekday patterns, its Gregorian date shifts each year within a range of early September to early October.
Yom Kippur 2026 — Sunday, September 20, through Monday, September 21, 2026
Yom Kippur, the Day of Atonement, begins at sundown on Sunday, September 20, 2026, and ends at nightfall on Monday, September 21, 2026 (according to Hebcal).
The observance falls on the 10th day of Tishrei, exactly ten days after Rosh Hashanah, and is marked by a 25-hour fast and extended synagogue services.
Yom Kippur is not a public holiday in the United States, United Kingdom, Canada, or India, so it does not trigger government office closures; individual employers and school districts determine their own accommodation policies for observant staff and students.
Why Jewish Holiday Dates Change Every Year on the September 2026 Calendar
Jewish holiday dates shift on the Gregorian calendar because the Hebrew calendar is lunisolar, tracking lunar months while periodically inserting a leap month to stay aligned with the solar year.
A Hebrew month runs approximately 29.5 days, and seven out of every 19 years add a 13th month to prevent the calendar from drifting out of its seasonal anchor.
This mechanism is why Rosh Hashanah can fall as early as September 5 or as late as October 5, depending on the year, while always remaining anchored to early autumn.
Hispanic Heritage Month — Tuesday, September 15, through Thursday, October 15, 2026
Hispanic Heritage Month begins Tuesday, September 15, 2026, and runs through Thursday, October 15, 2026. The observance starts mid-month rather than on September 1 because September 15 marks the independence anniversary of five Latin American nations — Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua — with Mexico’s Independence Day following one day later on September 16 and Chile’s on September 18. The 30-day observance period was expanded from a single week to a full month under federal law in 1988.
Other Faith Observances in September 2026
Several additional religious dates fall in September 2026, spanning Hindu, Jain, and Coptic Orthodox traditions.
- Krishna Janmashtami falls on Friday, September 4, 2026, for most Hindu households following the Smarta tradition; ISKCON and most Vaishnava temples observe it one day later, on Saturday, September 5, 2026, because the two traditions prioritize different astrological alignments (Ashtami Tithi versus Rohini Nakshatra).
- Paryushana, an eight-day Jain observance of fasting and reflection, begins in early September 2026 according to interfaith calendar trackers.
- Coptic Orthodox New Year (Nayrouz) falls on Friday, September 11, 2026, marking the start of the Coptic calendar year.
International and United Nations Observance Days in September 2026
The United Nations designates several international observance days that fall on the September 2026 calendar, alongside the opening of its 81st General Assembly session.
International Day of Peace — Monday, September 21, 2026
The International Day of Peace falls on Monday, September 21, 2026, and is observed globally with a call for a 24-hour ceasefire and nonviolence. The UN General Assembly established the fixed September 21 date in 2001; before that year, the observance floated to the opening day of the General Assembly’s regular annual session.
International Literacy Day — Tuesday, September 8, 2026
International Literacy Day falls on Tuesday, September 8, 2026, and has been observed annually since UNESCO established it in 1966 to highlight literacy as a matter of human dignity and rights.
World Suicide Prevention Day — Thursday, September 10, 2026
World Suicide Prevention Day falls on Thursday, September 10, 2026, coordinated by the International Association for Suicide Prevention in partnership with the World Health Organization. In the United States, the 988 Suicide & Crisis Lifeline provides free, confidential support by call or text at 988, available 24 hours a day.
81st Session of the UN General Assembly — Opens Tuesday, September 8, 2026
The 81st session of the UN General Assembly (UNGA 81) opens on Tuesday, September 8, 2026, at UN Headquarters in New York. The high-level General Debate — the portion featuring heads of state and government — begins two weeks later, on Tuesday, September 22, 2026, and continues through the General Assembly’s High-Level Week, which concludes on Monday, September 28, 2026.
The 81st session presidency rotates to a representative from the Asia-Pacific Group under the UN’s standard regional rotation.
National Days in September 2026 — Day-by-Day Highlights
September carries more than 200 informal national days tracked by observance aggregators such as National Day Calendar and Calendarr.
These are distinct from federal holidays or UN-designated days: they carry no legal status, no office closures, and no standardized governing authority, but they generate substantial year-round search volume and social-media engagement.
The selections below highlight the most notable observance per period rather than reproducing the full aggregate list, which exceeds 200 individual entries across the month.
September 1–7, 2026, National Days
- Tuesday, September 1, 2026: World Letter Writing Day
- Wednesday, September 2, 2026: V-J Day (Victory over Japan Day)
- Thursday, September 3, 2026: National Skyscraper Day
- Friday, September 4, 2026: National Macadamia Nut Day; Krishna Janmashtami (Smarta tradition)
- Saturday, September 5, 2026: World Beard Day
- Sunday, September 6, 2026: National Coffee Ice Cream Day; Father’s Day (Australia)
- Monday, September 7, 2026: Labor Day (USA); International Day of Clean Air for Blue Skies
September 8–14, 2026, National Days
- Tuesday, September 8, 2026: World Physiotherapy Day; International Literacy Day
- Wednesday, September 9, 2026: National Teddy Bear Day
- Thursday, September 10, 2026: National School Picture Day; World Suicide Prevention Day
- Friday, September 11, 2026: National 401(k) Day; Patriot Day; Rosh Hashanah begins
- Saturday, September 12, 2026: National Pet Memorial Day
- Sunday, September 13, 2026: Day of the Programmer; Grandparents’ Day (USA)
- Monday, September 14, 2026: National Sober Day
September 15–21, 2026, National Days
- Tuesday, September 15, 2026: National Online Learning Day; Hispanic Heritage Month begins; International Day of Democracy
- Wednesday, September 16, 2026: National Working Parents Day; Mexican Independence Day
- Thursday, September 17, 2026: Constitution Day and Citizenship Day
- Friday, September 18, 2026: National POW/MIA Recognition Day
- Saturday, September 19, 2026: National Cleanup Day; Oktoberfest opens
- Sunday, September 20, 2026: National Punch Day; Yom Kippur begins
- Monday, September 21, 2026: International Day of Peace; Yom Kippur ends
September 22–30, 2026, National Days
- Tuesday, September 22, 2026: World Car-Free Day; National Voter Registration Day; autumn equinox
- Wednesday, September 23, 2026: National Checkers Day
- Thursday, September 24, 2026: National Punctuation Day
- Friday, September 25, 2026: National Comic Book Day; Native American Day (California, Nevada)
- Saturday, September 26, 2026: National Hunting and Fishing Day; Harvest/Full Moon
- Sunday, September 27, 2026: World Rivers Day; Gold Star Mother’s Day
- Monday, September 28, 2026: International Right to Know Day
- Tuesday, September 29, 2026: National Biscotti Day
- Wednesday, September 30, 2026: World Maritime Day; International Translation Day
The Most Shareable National Days of September 2026
A handful of September’s national days generate disproportionate social engagement due to their novelty rather than their formal recognition.
National Video Games Day, National Comic Book Day (September 25), and National Meow Like a Pirate Day (September 19) rank among the most-shared September observances because they lend themselves to visual, participatory content rather than passive acknowledgment.
September 2026 Awareness Months and Weekly Observances
September carries dozens of concurrent monthly and weekly health, safety, and civic awareness campaigns, distinct from single-day observances.
Monthly Awareness Campaigns
The full month of September 2026 hosts several major public-health and civic campaigns concurrently, including the following:
- Hunger Action Month
- Childhood Cancer Awareness Month
- National Suicide Prevention Month
- Library Card Sign-Up Month
- National Preparedness Month
- National Recovery Month
- National Hispanic Heritage Month (begins September 15)
Weekly Observances
Several sub-month weekly campaigns run on fixed or rule-based schedules within September 2026, including these:
- National Payroll Week runs from Tuesday, September 1, through Friday, September 5, 2026 (the first Monday–Friday week of the month).
- National Truck Driver Appreciation Week runs Monday, September 14, through Sunday, September 20, 2026.
- Banned Books Week runs Monday, September 21, through Sunday, September 27, 2026.
- Constitution Week runs from Thursday, September 17, through Wednesday, September 23, 2026.
Major Events and Festivals in September 2026
September 2026 hosts several internationally significant cultural and sporting events, with more precise scheduling data than most competing calendar pages publish.
Global Cultural and Entertainment Events
- Venice Film Festival runs September 2–12, 2026, in Venice, Italy.
- Oktoberfest runs Saturday, September 19, through Sunday, October 4, 2026, on the Theresienwiese in Munich, Germany — the 191st running of the festival, spanning 16 days (per the official City of Munich Oktoberfest site).
- UN General Assembly High-Level Week runs from Tuesday, September 22, through Monday, September 28, 2026, in New York City.
Sports Calendar
- NFL 2026 season kickoff: The regular season opens Wednesday, September 9, 2026, with the defending Super Bowl champion Seattle Seahawks hosting the New England Patriots; Week 1 concludes Monday, September 14, 2026 (per NFL.com and Wikipedia’s 2026 NFL season records).
- Formula 1 Italian Grand Prix: The race weekend runs Friday, September 4, through Sunday, September 6, 2026, at Monza — round 15 of the 2026 season, with the race itself on Sunday, September 6.
Long Weekends and Best Travel Dates in September 2026
September 2026 offers one primary US long weekend tied to a federal holiday, plus several regionally observed extended weekends.
Labor Day Long Weekend — Saturday, September 5, through Monday, September 7, 2026
The Labor Day long weekend runs from Saturday, September 5, through Monday, September 7, 2026, giving US workers with a standard Monday holiday three consecutive days off without using paid leave. This weekend represents the highest-volume domestic travel period in September, as it is the last three-day weekend before the winter holiday season for most US calendars.
Other Regional Long-Weekend Opportunities
Outside the United States, September 2026 offers additional planning windows: Labor Day (Canada) also falls on Monday, September 7, 2026, mirroring the US date; several European regions observe Constitution- or heritage-linked regional holidays at various points in the month, and travelers targeting the Mexican Independence Day period (September 15–16) can combine both dates into an extended Tuesday–Wednesday window when paired with weekend travel.
School, Academic, and Business Calendar for September 2026
September functions as the primary back-to-school and Q3 planning month for US institutions and businesses.
Back-to-School Timing
Most US public school districts begin the 2026–2027 academic year in the final week of August or the first week of September 2026, with a large concentration of districts scheduling the first instructional day for the Tuesday or Wednesday immediately following Labor Day — meaning Tuesday, September 8, 2026, or Wednesday, September 9, 2026, for districts that treat Labor Day as the unofficial start-of-year marker.
This pattern is not universal: districts vary by state and even by county, so families should confirm exact start dates against their specific school board calendar rather than assuming a September-wide start date applies uniformly.
Business Days Remaining in September 2026
September 2026 contains 21 federal business days. This figure is calculated by starting from the month’s 22 weekdays (30 total days minus 8 weekend days across four full weekends) and subtracting the single federal holiday closure, Labor Day, on Monday, September 7, 2026.
This calculation applies to federal offices, federally regulated banks, and the US stock exchanges; it does not apply directly to businesses that separately close for Rosh Hashanah, Yom Kippur, or other non-federal observances, which would reduce the effective business-day count further for those specific organizations.
September 2026 Holidays Around the World
September holiday coverage varies significantly by country, and several regions carry September 2026 observances that US-centric calendar content typically omits.
United States
The United States observes one federal holiday (Labor Day, September 7) and two federal observances without closures (Patriot Day, September 11; Constitution Day, September 17) in September 2026, alongside state-specific dates such as Native American Day in California and Nevada on Friday, September 25, 2026.
Europe
The United Kingdom does not observe a public holiday in September 2026; Germany’s Oktoberfest, while not a public holiday, functions as the country’s largest cultural event of the month, running September 19–October 4, 2026, in Munich.
The Netherlands observes Prinsjesdag (Budget Day), the ceremonial opening of the Dutch parliamentary year, on the third Tuesday of September — September 15, 2026.
Asia
The Philippines observes National Heroes Day-adjacent regional dates and back-to-school planning through September; Indonesia tracks “tanggal merah” (red-letter public holiday dates) separately from school-holiday (“cuti sekolah”) periods, which do not always align in September.
India’s Tamil calendar and Kalnirnay almanac track regional festival dates that run independently of the Gregorian civil calendar, including regional harvest and temple festival observances scattered throughout September.
Independence and National Days Worldwide
Several nations mark independence or national days during September 2026, including Brazil (Independence Day, Monday, September 7, 2026) and Mexico (Independence Day, Wednesday, September 16, 2026).
The comparison table below summarizes these against the US federal calendar.
| Country | Observance | Date (2026) | Type |
|---|---|---|---|
| United States | Labor Day | Monday, September 7, 2026 | Federal holiday |
| Brazil | Independence Day | Monday, September 7, 2026 | National holiday |
| Mexico | Independence Day | Wednesday, September 16, 2026 | National holiday |
| Netherlands | Prinsjesdag (Budget Day) | Tuesday, September 15, 2026 | Ceremonial/parliamentary |
September Zodiac Signs, Birthstone, Birth Flowers, Moon Phases, and the Autumn Equinox in September 2026
September 2026 carries three astronomical and astrological reference points that frequently accompany calendar searches: a zodiac sign transition, three tracked lunar phases, and the astronomical start of autumn.
September’s symbolic attributes are fixed by tradition and do not change year to year, unlike its moon phases and equinox timing, which are 2026-specific.
| Attribute | Value |
|---|---|
| Month number | 9th month of the Gregorian calendar |
| Days in month | 30 |
| Etymology | From Latin septem (“seven”); September was the 7th month in the pre-Julian Roman calendar |
| Season (Northern Hemisphere) | Summer transitions to autumn on September 22, 2026 |
| Season (Southern Hemisphere) | Winter transitions to spring on September 22, 2026 |
| Fiscal quarter | Q3 (final month) for calendar-year businesses |
| Birthstone | Sapphire — symbolizes wisdom, loyalty, and nobility |
| Alternative/historical birthstone | Lapis lazuli (used in some pre-20th-century birthstone lists) |
| Birth flowers | Aster (symbolizes love and wisdom) and Morning Glory (symbolizes affection and mortality) |
| Birth colors | Blue and gray, drawn from the sapphire association |
| Zodiac signs | Virgo (through September 22) and Libra (from September 23) |
| Chinese zodiac year (2026) | Year of the Fire Horse (Bǐng Wǔ), running February 17, 2026 – February 5, 2027 |
| Tropical zodiac element split | Earth (Virgo) transitioning to Air (Libra) |
| Autumn equinox 2026 | Tuesday, September 22, 2026, at approximately 8:04 P.M. EDT (00:04–00:06 UTC, September 23) |
| Harvest Moon 2026 | Saturday, September 26, 2026 — the full moon nearest the equinox |
Virgo vs. Libra: September 2026 Zodiac Comparison
September is the only month that contains a full zodiac sign transition, splitting between Virgo and Libra roughly two-thirds of the way through the month.
| Attribute | Virgo | Libra |
|---|---|---|
| Date range | August 23 – September 22 | September 23 – October 22 |
| Days active in September 2026 | September 1–22 (22 days) | September 23–30 (8 days) |
| Element | Earth | Air |
| Quality (modality) | Mutable | Cardinal |
| Ruling planet | Mercury | Venus |
| Symbol | The Maiden | The Scales |
| Tarot card | The Hermit | Justice |
| Associated body part | Digestive system | Kidneys and lower back |
| Compatible signs (traditionally cited) | Taurus, Cancer, Capricorn | Gemini, Leo, Aquarius |
Zodiac cusp dates are conventional approximations rather than fixed astronomical boundaries; some almanacs place the Virgo–Libra transition on September 22 rather than September 23, depending on the source’s rounding method.
September 2026 Moon Phases
All four primary lunar phases fall within September 2026, based on cross-referenced ephemeris data (Hebcal, TheSkyLive, Solunak).
| Phase | Date (2026) | Day | Approx. Time (UTC) |
|---|---|---|---|
| Last Quarter | September 4, 2026 | Friday | 07:52 UTC |
| New Moon | September 11, 2026 | Friday | 03:28 UTC |
| First Quarter | September 18, 2026 | Friday | 20:45 UTC |
| Full Moon (Harvest Moon) | September 26, 2026 | Saturday | 16:50 UTC |
The September 26, 2026, full moon carries the name “Harvest Moon” rather than “Corn Moon” because it falls within roughly one week of the autumn equinox (September 22), a naming rule that overrides the standard monthly full-moon name whenever the two dates are close together — 4 days apart in 2026.
UTC-based instants can register one calendar date earlier in US Pacific and Hawaii time zones; for example, the September 4 Last Quarter (07:52 UTC) still falls on September 4 in all continental US zones, but the September 11 New Moon (03:28 UTC) falls at approximately 11:28 P.M.
EDT on September 10 in US Eastern Time — a one-day offset worth flagging if the content targets a US audience specifically.
Frequently Asked Questions About the September 2026 Calendar
Is Labor Day the same date every year?
No. Labor Day is fixed to the first Monday of September rather than a fixed calendar date, so its Gregorian date shifts annually between September 1 and September 7. In 2026, it falls on Monday, September 7.
Is September 11 a paid federal holiday in 2026?
No. September 11 (Patriot Day) is a federal observance, not a federal holiday. Federal offices, banks, and the US Postal Service operate on their normal Friday schedule on Friday, September 11, 2026.
When does Hispanic Heritage Month start and end in 2026?
Hispanic Heritage Month runs from Tuesday, September 15, 2026, through Thursday, October 15, 2026, a fixed 30-day window that does not shift year to year.
Why does Rosh Hashanah fall on a different date each year?
Rosh Hashanah’s Gregorian date shifts because the Hebrew calendar is lunisolar, adding a leap month in 7 of every 19 years to stay aligned with the solar year, which moves the holiday’s civil-calendar date within a range of early September to early October.
What is the first day of fall in 2026?
The first day of astronomical fall in 2026 is Tuesday, September 22, at approximately 8:04 P.M. Eastern Daylight Time, when the autumn equinox occurs.
How many business days are in September 2026?
September 2026 contains 21 federal business days: 22 total weekdays minus the single federal holiday closure, Labor Day, on Monday, September 7, 2026.
Are banks and the post office closed on Labor Day 2026?
Yes. Banks, federal offices, and the US Postal Service close on Monday, September 7, 2026, for Labor Day, and the New York Stock Exchange and Nasdaq do not trade.
Is Constitution Day a federal holiday?
No. Constitution Day and Citizenship Day, observed on Thursday, September 17, 2026, is a federal observance requiring educational programming at federally funded institutions, not a holiday with office closures.
