September 2025 Calendar
September 2025 had 30 days, from Monday, September 1 to Tuesday, September 30. It had 21 working days and one federal holiday: Labor Day (Monday, September 1).
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 |
|---|---|---|---|---|---|---|---|
| 36 | 1Labor Day | 2 | 3 | 4 | 5 | 6 | |
| 37 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 38 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 39 | 21 | 22 | 23Rosh Hashanah | 24 | 25 | 26 | 27 |
| 40 | 28 | 29 | 30 |
Holidays and observances in September 2025
| Holiday | Date | Day | Type |
|---|---|---|---|
| Labor Day | Monday | Federal | |
| Rosh Hashanah Begins at sundown the evening before. | Tuesday | Religious |
September 2025 at a glance
Key dates in September 2025
Times are Eastern Time (EST/EDT).
| Date | Event | Details |
|---|---|---|
| Total lunar eclipse | Greatest eclipse Sunday, September 7, 2:12 PM EDT. Visible from: Europe, Africa, Asia, Australia | |
| Partial solar eclipse | Greatest eclipse Sunday, September 21, 3:42 PM EDT. Visible from: South Pacific, New Zealand, Antarctica | |
| September equinox — first day of fall | Monday, September 22, 2:19 PM EDT |
Moon phases in September 2025
Times are Eastern Time (EST/EDT). All 2025 moon phases.
| Phase | Date | Time (ET) |
|---|---|---|
| Full Moon (Corn Moon) | 2:09 PM EDT | |
| Last Quarter | 6:33 AM EDT | |
| New Moon | 3:54 PM EDT | |
| First Quarter | 7:54 PM EDT |
August 2025 and October 2025
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 2025?
The first business day was Tuesday, September 2 and the last was Tuesday, September 30, counting Monday–Friday and skipping US federal holidays.
How many working hours are in September 2025?
September 2025 had 168 working hours at 8 hours per working day, or 176 hours for someone who worked through the federal holidays.
Are there any three-day weekends in September 2025?
Yes. Federal workers got one three-day weekend: Aug 30 – Sep 1 (Labor Day).
How many weekends are in September 2025?
September 2025 had four full Saturday–Sunday weekends. Mondays and Tuesdays occurred five times and every other weekday four times.