October 2027 has 31 days, running Friday, October 1 through Sunday, October 31. It carries one federal holiday, Columbus Day on Monday, October 11, and 20 working days.
October 2027 is the densest observance month of the year. The entire Jewish High Holy Day season falls inside it — Rosh Hashanah, Yom Kippur, Sukkot, Shmini Atzeret and Simchat Torah — which is unusual, since Rosh Hashanah normally arrives in September.
The month also holds ten weekend days, the maximum a 31-day month can contain, which is what pushes the working-day count down to 20.
Table of Contents
Holidays in October 2027
| Date | Day | Observance | Type |
|---|---|---|---|
| October 1 | Friday | Rosh Hashanah begins at sundown | Jewish |
| October 3 | Sunday | Rosh Hashanah ends at nightfall | Jewish |
| October 10 | Sunday | Yom Kippur begins at sundown | Jewish |
| October 11 | Monday | Columbus Day, Indigenous Peoples’ Day | Federal holiday |
| October 11 | Monday | Yom Kippur ends at nightfall | Jewish |
| October 15 | Friday | Sukkot begins at sundown | Jewish |
| October 15 | Friday | National Hispanic Heritage Month ends | Commemorative |
| October 22 | Friday | Sukkot ends; Shmini Atzeret begins at sundown | Jewish |
| October 23 | Saturday | Simchat Torah begins at sundown | Jewish |
| October 24 | Sunday | United Nations Day | International |
| October 31 | Sunday | Halloween | Cultural |
Columbus Day is the only federal holiday in October 2027 (U.S. Office of Personnel Management).
Check Out National Days in October 2027.
Jewish holiday dates are from Hebcal for Hebrew year 5788; all begin at sundown on the date given and end at nightfall.
Yom Kippur and Columbus Day fall on the same day
Yom Kippur 5788 begins at sundown on Sunday, October 10, 2027 and ends at nightfall on Monday, October 11 — the same Monday as the Columbus Day federal holiday.
This coincidence has a practical effect worth knowing: the federal closure that day means many workplaces are already shut, which for observant employees removes the usual need to arrange leave.
It is not a recurring alignment.
Both dates move independently, Columbus Day on a second-Monday rule and Yom Kippur on the Hebrew calendar.
October 2027 calendar closures by institution
| Institution | Monday, October 11, 2027 |
|---|---|
| Federal offices | Closed |
| Banks and Federal Reserve | Closed |
| U.S. Postal Service | No delivery, offices closed |
| NYSE and Nasdaq | Open, normal trading |
| Bond markets, SIFMA | Closed |
| UPS and FedEx | Normal service |
| State government | Closed in some states, open in others |
| Public schools | Varies widely by district |
| Retail and grocery | Open |
Columbus Day has the widest gap between federal status and actual closure of any holiday on the calendar.
The stock exchanges trade while the bond market closes; the postal service suspends delivery while UPS and FedEx run normal routes.
State observance varies more than for any other federal holiday, with several states observing Indigenous Peoples’ Day instead, South Dakota observing Native American Day, and Hawaii observing Discoverers’ Day.
Events in October 2027
Month-long observances running through all of October 2027:
- National Breast Cancer Awareness Month, observed since 1985
- National Domestic Violence Awareness Month
- National Cybersecurity Awareness Month
- National Bullying Prevention Month
- National Disability Employment Awareness Month
National Hispanic Heritage Month ends on Friday, October 15, 2027, having begun on September 15. It spans the two months rather than sitting inside one.
Halloween falls on Sunday, October 31, 2027. Because daylight saving time does not end until Sunday, November 7, the clocks have not yet changed, so sunset lands close to 6:00 p.m. rather than 5:00 p.m.
Some municipalities move trick-or-treating to Saturday, October 30 when the date falls on a Sunday; there is no national rule and local announcements are usually issued in early October.
October 2027 is exceptionally rich in religious and cultural observances, hosting nearly all major Jewish High Holy Days, key Hindu autumn festivals (Sharad Navratri, Dussehra, and Diwali), and standard civic holidays.
| Date | Day | Event / Observance | Category |
| October 1 | Friday | Erev Rosh Hashanah (Begins at sundown) | Jewish |
| October 2–3 | Sat – Sun | Rosh Hashanah (Jewish New Year 5788) | Jewish |
| October 2 | Saturday | Gandhi Jayanti / Int’l Day of Non-Violence | Cultural / Commemorative |
| October 4 | Monday | Feast of St. Francis of Assisi | Christian (Catholic / Anglican) |
| October 9 | Saturday | Dussehra (Vijayadashami) / End of Navratri | Hindu |
| October 10 | Sunday | Erev Yom Kippur (Begins at sundown) | Jewish |
| October 11 | Monday | Yom Kippur (Day of Atonement) | Jewish |
| October 11 | Monday | Indigenous Peoples’ Day / Columbus Day | US Holiday |
| October 11 | Monday | Thanksgiving Day (Canada) | Canadian National Holiday |
| October 15 | Friday | Erev Sukkot (Begins at sundown) | Jewish |
| October 16–22 | Sat – Fri | Sukkot (Feast of Tabernacles) | Jewish |
| October 23 | Saturday | Shemini Atzeret | Jewish |
| October 24 | Sunday | Simchat Torah | Jewish |
| October 24 | Sunday | United Nations Day | International Observance |
| October 29 | Friday | Dhanteras (Diwali begins) | Hindu |
| October 29 | Friday | Diwali (Deepavali) / Bandi Chhor Divas | Hindu / Sikh / Jain |
| October 31 | Sunday | Halloween | Cultural / Secular |
| October 31 | Sunday | Reformation Day | Christian (Protestant) |
Highlights of the Month
- Jewish High Holy Days & Festivals:Because 2027 follows the lunar Jewish calendar (Tishrei 5788), the entire cycle of major autumn festivals falls within this single month—opening with Rosh Hashanah, followed by the solemn fast of Yom Kippur, and closing with the week-long harvest festival of Sukkot and Simchat Torah.
- Hindu Autumn Season: The final days of Sharad Navratri culminate in Dussehra on October 9. Later in the month, the five-day festival of lights commences with Dhanteras and peaks with Diwali on October 29.
- Civic & North American Holidays: The second Monday of the month (October 11) marks both Canadian Thanksgiving and the federal US holiday observed as Columbus Day / Indigenous Peoples’ Day. The month concludes with Halloween on October 31.
How many days, weeks and working days in October 2027
October 2027 has 31 days, 4 full weeks plus 3 days, 21 weekdays, and 20 working days after Columbus Day is removed.
The calculation:
- October always has 31 days.
- 31 ÷ 7 gives 4 complete weeks with 3 days remaining.
- Ten of the 31 days fall on a Saturday or Sunday — the maximum possible for a 31-day month — leaving 21 Monday-to-Friday weekdays.
- Columbus Day falls on Monday, October 11, a weekday, so 21 − 1 = 20 working days.
The 20 figure assumes an employer that closes for Columbus Day. Most private-sector employers do not, and those that stay open count 21.
October 2027 calendar weekday counts
| Weekday | Occurrences |
|---|---|
| Friday | 5 |
| Saturday | 5 |
| Sunday | 5 |
| Monday | 4 |
| Tuesday | 4 |
| Wednesday | 4 |
| Thursday | 4 |
Five Fridays, Saturdays and Sundays — five complete weekends, matching May as the other month in 2027 with ten weekend days.
October 2027 calendar week numbers and day-of-year positions
October 2027 spans ISO weeks 39 through 43. October 1 is day 274 of 2027 and October 31 is day 304, leaving 61 days in the year after the month ends.
October 2027 moon phases
Times are U.S. Eastern Daylight Time. Daylight saving time runs through Sunday, November 7, so every phase this month is on daylight time.
| Phase | Date | Time |
|---|---|---|
| First Quarter | Thursday, October 7 | 7:47 a.m. EDT |
| Full Moon — Hunter’s Moon | Friday, October 15 | 9:46 a.m. EDT |
| Last Quarter | Friday, October 22 | 1:29 p.m. EDT |
| New Moon | Friday, October 29 | 9:36 a.m. EDT |
Three of the four phases fall on a Friday.
The October full moon is the Hunter’s Moon rather than the Harvest Moon in 2027.
The Harvest Moon is the full moon nearest the September equinox, which falls on September 23; the September 15 full moon is 8 days before it while October 15 is 22 days after, so September takes the Harvest title.
The new moon on Friday, October 29 falls two days before Halloween, which means the sky is close to its darkest on Sunday, October 31 — a waxing crescent only two days old sets shortly after the Sun.
Frequently asked questions
How many working days are in October 2027?
20, if your employer observes Columbus Day; 21 if it does not. The month has 21 weekdays, held down by ten weekend days. Columbus Day on Monday, October 11 is the only federal holiday in the month.
What day is Halloween 2027?
Sunday, October 31, 2027. Because daylight saving time does not end until Sunday, November 7, sunset falls around 5:55 to 6:05 p.m. across most of the continental United States — about an hour later than in years when the clocks change first.
When are the Jewish High Holy Days in 2027?
Entirely within October. Rosh Hashanah begins at sundown on Friday, October 1 and ends at nightfall on Sunday, October 3. Yom Kippur runs from sundown Sunday, October 10 to nightfall Monday, October 11 (Hebcal, Hebrew year 5788). Sukkot follows from sundown on Friday, October 15. This is later than usual; the High Holy Days normally begin in September.
