September 2028 Calendar
A printable September 2028 calendar with US holidays marked and a Monday week start. Print it below, or download it as a PDF, editable Word or Excel file.
September 2028 has 30 days, starts on a Friday, and covers ISO weeks 35–39. There are 20 working days and 9 weekend days.
About September 2028
September starts with Labor Day and shifts into autumn at the equinox around September 22. School is back in session and the pace picks up.
- Length: 30 days, from Friday September 1 to Saturday September 30.
- Working days: 20 (160 working hours); 9 weekend days.
- Week numbers: ISO weeks 35–39; days 245–274 of the year, in Q3.
- Season & sky: a autumn (from the equinox) month, with 4 moon phases and the Sapphire birthstone.
Make it yours: want September on a designed background or with your own photo? Open it in the calendar maker, or download the fully editable Word version and type your events straight into the boxes.
Holidays & Observances in September 2028
| Date | Day | Holiday | |
|---|---|---|---|
| Sep 4 | Monday | Labor Day | Federal |
Moon Phases in September 2028
| Phase | Date | |
|---|---|---|
| ◯ | Full Moon | Monday, September 4 |
| ◖ | Last Quarter | Monday, September 11 |
| ● | New Moon | Tuesday, September 19 |
| ◕ | First Quarter | Tuesday, September 26 |
September Facts
| Birthstone | Sapphire |
| Birth flowers | Aster & Morning Glory |
| Zodiac signs | Virgo (until September 22), then Libra |
| Season | autumn (from the equinox) |
| Quarter | Q3 2028 |
Print, Customize & Plan
- 🖨 Use the Print button above, or grab the PDF, Word or Excel download.
- 🎨 Add a designed background from our template gallery or your own photo in the calendar maker.
- 💼 Planning tools: working days in 2028 · days between dates · all 2028 formats.
- 📅 See the full 2028 yearly calendar or all 2028 holidays.
Notable Dates in September
| Date | Occasion | Type |
|---|---|---|
| varies | Labor Day (1st Monday) | holiday |
| Sep 8 | International Literacy Day | observance |
| Sep 11 | Patriot Day (USA) | observance |
| Sep 15 | International Day of Democracy | observance |
| Sep 17 | Constitution Day (USA) | observance |
| Sep 19 | Talk Like a Pirate Day | fun |
| Sep 21 | International Day of Peace | observance |
| varies | First Day of Autumn (Equinox) | astronomy |
| Sep 29 | National Coffee Day (USA) | fun |
September 2028 Calendar FAQ
How many days are in September 2028?
September 2028 has 30 days. It begins on a Friday and ends on a Saturday.
How many working days are in September 2028?
There are 20 working days in September 2028 (about 160 working hours), after taking out weekends and any observed federal holidays. It also has 9 weekend days.
What week numbers does September 2028 cover?
September 2028 spans ISO weeks 35 through 39, covering days 245 to 274 of the year.
What holidays are in September 2028?
September 2028 includes Labor Day.
What day of the week is Labor Day 2028?
Labor Day 2028 falls on a Monday, September 4.