September 2028 Calendar
Updated November 6, 2026 · Edited by the JanuaryCalendar.com team
September 2028 starts on Friday, September 1, and ends on Saturday, September 30. It has 30 days, 21 weekdays and 20 US working days. US federal holidays: Labor Day (Mon, Sep 4).
- Starts
- Friday
- Days
- 30
- US working days
- 20
- Full moon
- Sep 3
- Birthstone
- Sapphire
- Zodiac
- Virgo, Libra
September 2028
| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
|---|---|---|---|---|---|---|
| 1 | 2 | |||||
| 3Full Moon | 4Labor Day | 5 | 6 | 7 | 8 | 9 |
| 10Grandparents Day | 11Last QuarterPatriot Day | 12 | 13 | 14 | 15 | 16 |
| 17 | 18New Moon | 19 | 20 | 21 | 22 | 23 |
| 24 | 25First Quarter | 26 | 27 | 28 | 29 | 30 |
- Sep 3○ Full Moon, 7:48 p.m. EDT
- Sep 4Labor Day
- Sep 10National Grandparents Day (US)
- Sep 11Patriot Day
- Sep 11◑ Last Quarter, 8:46 p.m. EDT
- Sep 18● New Moon, 2:24 p.m. EDT
- Sep 25◐ First Quarter, 9:10 a.m. EDT
September 2028 holidays and observances
| Date | Day | Holiday or observance | Notes |
|---|---|---|---|
| Sep 4 | Mon | Labor Day | Federal holiday |
| Sep 10 | Sun | National Grandparents Day (US) | Observance |
| Sep 11 | Mon | Patriot Day | 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) |
|---|---|---|---|
| ○ Full Moon | Sunday, September 3 | 7:48 p.m. EDT | Sep 03, 23:48 UTC |
| ◑ Last Quarter | Monday, September 11 | 8:46 p.m. EDT | Sep 12, 00:46 UTC |
| ● New Moon | Monday, September 18 | 2:24 p.m. EDT | Sep 18, 18:24 UTC |
| ◐ First Quarter | Monday, September 25 | 9:10 a.m. EDT | Sep 25, 13:10 UTC |
Calculated with standard astronomical algorithms; Eastern Time.
Working days
September 2028 has 20 working days in the US: 21 weekdays minus 1 federal holiday on a weekday. Friday and Saturday occur five times.
| Weekday | Count |
|---|---|
| Sunday | 4 |
| Monday | 4 |
| Tuesday | 4 |
| Wednesday | 4 |
| Thursday | 4 |
| Friday | 5 |
| Saturday | 5 |
Week numbers
| ISO week | Dates |
|---|---|
| Week 35 | Sep 1 – 3 |
| Week 36 | Sep 4 – 10 |
| Week 37 | Sep 11 – 17 |
| Week 38 | Sep 18 – 24 |
| Week 39 | Sep 25 – 30 |
Printable September 2028 calendar
Free for personal, classroom and office use. See all printable calendars.
Frequently asked questions
How many days are in September 2028?
September 2028 has 30 days. It starts on a Friday and ends on a Saturday.
How many working days are in September 2028?
September 2028 has 20 US working days (21 weekdays minus federal holidays).
What federal holidays are in September 2028?
Labor Day (Mon, Sep 4).
When is the full moon in September 2028?
The full moon is on Sunday, September 3, 2028 at 7:48 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.