September 2025 has 30 days
The month opens on a Monday and closes on a Tuesday. It holds 22 working days and 8 weekend days, and covers days 244 to 273 of 2025. It ended 358 days ago.
How many days are in September 2025?
September 2025 has 30 days. Month lengths never change outside February, so September always has 30 days. Of those, 22 fall on a weekday and 8 at a weekend, which is the split before any public holiday is deducted.
What day does September 2025 start on?
1 September 2025 is a Monday and 30 September is a Tuesday. The month spans ISO weeks 36 to 40 and contains 5 Mondays, 4 Fridays, 4 Saturdays and 4 Sundays.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
What is on in September 2025?
| Date | What it is | Kind | Days away |
|---|---|---|---|
| 1 September | Labor Day | holiday | today |
| 1 September | Labour Day | holiday | today |
| 1 September | September starts | observance | today |
| 5 September | International Day of Charity | observance | 4 days |
| 7 September | Full Moon | sky event | 6 days |
| 7 September | Total lunar eclipse | sky event | 6 days |
| 8 September | International Literacy Day | observance | 7 days |
| 11 September | Patriot Day | observance | 10 days |
| 14 September | Last Quarter | sky event | 13 days |
| 21 September | International Day of Peace | observance | 20 days |
| 21 September | New Moon | sky event | 20 days |
| 21 September | Partial solar eclipse | sky event | 20 days |
| 22 September | September equinox | astronomical | 21 days |
| 23 September | International Day of Sign Languages | observance | 22 days |
| 29 September | First Quarter | sky event | 28 days |
| 30 September | National Day for Truth and Reconciliation | holiday | 29 days |
| 30 September | US federal fiscal year ends | observance | 29 days |
Moon phases in September 2025
| Phase | Date | Weekday | Note |
|---|---|---|---|
| Full Moon | 7 September | Sunday | traditionally the Corn Moon |
| Last Quarter | 14 September | Sunday | instant given in UTC |
| New Moon | 21 September | Sunday | instant given in UTC |
| First Quarter | 29 September | Monday | instant given in UTC |
Phase instants are computed in Universal Time. A phase falling late in the UTC day can read as the previous calendar date in the Americas, which is why published moon calendars sometimes disagree by one day.
Sky events and season boundaries in September 2025
The september equinox falls in this month, opening autumn in the northern hemisphere. No catalogued meteor shower peaks in it. total lunar eclipse and partial solar eclipse fall in the month, each visible only from part of the Earth.
How many working days in September 2025?
There are 22 working days in September 2025 on a Monday to Friday week, and 8 weekend days. 3 public holidays from the catalogued countries fall in the month: Labor Day on 1 September, Labour Day on 1 September, National Day for Truth and Reconciliation on 30 September. Whether any of those reduces your own working total depends on which country you are in.
Questions about September 2025
- How many days are in September 2025?
- 30 days.
- What day of the week does September 2025 start on?
- A Monday. It ends on a Tuesday.
- How many working days are in September 2025?
- 22, counting Monday to Friday and not deducting public holidays.
- What holidays are in September 2025?
- Labor Day, Labour Day, National Day for Truth and Reconciliation.
- How many weekends are in September 2025?
- 4 Saturdays and 4 Sundays.
Other months
August 2025 · October 2025 · The 2025 calendar year · Every date in 2025