September 2027 Calendar
September 2027 has 30 days, from Wednesday, September 1 to Thursday, September 30. It has 21 working days and one federal holiday: Labor Day (Monday, September 6).
Updated · By the YearlyCalendar.org team
- Federal holiday / day off
- Observance
- Weekend
US federal holidays shaded · Wk = ISO week number
| Wk | SundaySun | MondayMon | TuesdayTue | WednesdayWed | ThursdayThu | FridayFri | SaturdaySat |
|---|---|---|---|---|---|---|---|
| 35 | 1 | 2 | 3 | 4 | |||
| 36 | 5 | 6Labor Day | 7 | 8 | 9 | 10 | 11 |
| 37 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 38 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 39 | 26 | 27 | 28 | 29 | 30 |
Holidays and observances in September 2027
| Holiday | Date | Day | Type |
|---|---|---|---|
| Labor Day | Monday | Federal |
September 2027 at a glance
Key dates in September 2027
Times are Eastern Time (EST/EDT).
| Date | Event | Details |
|---|---|---|
| September equinox — first day of fall | Thursday, September 23, 2:01 AM EDT |
Moon phases in September 2027
Times are Eastern Time (EST/EDT). All 2027 moon phases.
| Phase | Date | Time (ET) |
|---|---|---|
| First Quarter | 2:31 PM EDT | |
| Full Moon (Harvest Moon) | 7:04 PM EDT | |
| Last Quarter | 6:20 AM EDT | |
| New Moon | 10:36 PM EDT |
August 2027 and October 2027
About September
From the Latin septem, "seven" — it was the seventh month of the old Roman calendar. Birthstone: Sapphire. Birth flower: Aster. Zodiac: Virgo / Libra. All 12 months.
Frequently asked questions
What are the first and last business days of September 2027?
The first business day is Wednesday, September 1 and the last is Thursday, September 30, counting Monday–Friday and skipping US federal holidays.
How many working hours are in September 2027?
September 2027 has 168 working hours at 8 hours per working day, or 176 hours for someone who works through the federal holidays.
Are there any three-day weekends in September 2027?
Yes. Federal workers get one three-day weekend: Sep 4–6 (Labor Day).
How many weekends are in September 2027?
September 2027 has four full Saturday–Sunday weekends. Wednesdays and Thursdays occur five times and every other weekday four times.