How it's counted
January 1 moves forward one weekday each year, and two after a leap day. That is why September 21 lands on a different day every year.
September 21 in other years
| Year | Day of the week | Week number |
|---|---|---|
| 2024 | Saturday | 38 |
| 2025 | Sunday | 38 |
| 2026 | Monday | 39 |
| 2027 | Tuesday | 38 |
| 2028 | Thursday | 38 |
| 2029 | Friday | 38 |
| 2030 | Saturday | 38 |
| 2031 | Sunday | 38 |
| 2032 | Tuesday | 39 |
| 2033 | Wednesday | 38 |
| 2034 | Thursday | 38 |
Frequently asked questions
What day is September 21 this year?
September 21, 2027 is a Tuesday.
What day is September 21 next year?
September 21, 2028 is a Thursday.