September 2027 Calendar
Updated November 6, 2026 · Edited by the JanuaryCalendar.com team
September 2027 starts on Wednesday, September 1, and ends on Thursday, September 30. It has 30 days, 22 weekdays and 21 US working days. US federal holidays: Labor Day (Mon, Sep 6).
- Starts
- Wednesday
- Days
- 30
- US working days
- 21
- Full moon
- Sep 15
- Birthstone
- Sapphire
- Zodiac
- Virgo, Libra
September 2027
| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |||
| 5 | 6Labor Day | 7First Quarter | 8 | 9 | 10 | 11Patriot Day |
| 12Grandparents Day | 13 | 14 | 15Full Moon | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23Last Quarter | 24 | 25 |
| 26 | 27 | 28 | 29New Moon | 30 |
- Sep 6Labor Day
- Sep 7◐ First Quarter, 2:31 p.m. EDT
- Sep 11Patriot Day
- Sep 12National Grandparents Day (US)
- Sep 15○ Full Moon, 7:04 p.m. EDT
- Sep 23◑ Last Quarter, 6:21 a.m. EDT
- Sep 29● New Moon, 10:36 p.m. EDT
September 2027 holidays and observances
| Date | Day | Holiday or observance | Notes |
|---|---|---|---|
| Sep 6 | Mon | Labor Day | Federal holiday |
| Sep 11 | Sat | Patriot Day | Observance |
| Sep 12 | Sun | National Grandparents Day (US) | Observance |
Dates follow federal rules (a holiday on Saturday is observed Friday, on Sunday the following Monday). UK bank holidays follow standard rules; one-off extra holidays are announced by the government.
Moon phases
| Phase | Date (Eastern) | Time (ET) | Time (UTC) |
|---|---|---|---|
| ◐ First Quarter | Tuesday, September 7 | 2:31 p.m. EDT | Sep 07, 18:31 UTC |
| ○ Full Moon | Wednesday, September 15 | 7:04 p.m. EDT | Sep 15, 23:04 UTC |
| ◑ Last Quarter | Thursday, September 23 | 6:21 a.m. EDT | Sep 23, 10:21 UTC |
| ● New Moon | Wednesday, September 29 | 10:36 p.m. EDT | Sep 30, 02:36 UTC |
Calculated with standard astronomical algorithms; Eastern Time.
Working days
September 2027 has 21 working days in the US: 22 weekdays minus 1 federal holiday on a weekday. Wednesday and Thursday occur five times.
| Weekday | Count |
|---|---|
| Sunday | 4 |
| Monday | 4 |
| Tuesday | 4 |
| Wednesday | 5 |
| Thursday | 5 |
| Friday | 4 |
| Saturday | 4 |
Week numbers
| ISO week | Dates |
|---|---|
| Week 35 | Sep 1 – 5 |
| Week 36 | Sep 6 – 12 |
| Week 37 | Sep 13 – 19 |
| Week 38 | Sep 20 – 26 |
| Week 39 | Sep 27 – 30 |
Printable September 2027 calendar
Free for personal, classroom and office use. See all printable calendars.
Frequently asked questions
How many days are in September 2027?
September 2027 has 30 days. It starts on a Wednesday and ends on a Thursday.
How many working days are in September 2027?
September 2027 has 21 US working days (22 weekdays minus federal holidays).
What federal holidays are in September 2027?
Labor Day (Mon, Sep 6).
When is the full moon in September 2027?
The full moon is on Wednesday, September 15, 2027 at 7:04 p.m. EDT.
What is the September birthstone and zodiac sign?
The September birthstone is sapphire. People born Sep 1–22 are Virgo; those born Sep 23–30 are Libra.