How many days are in January?
January has 31 days. March, May, July, August, October and December also have 31 days.
January by year
| Year | Days | Starts on | Ends on | Weekdays |
|---|---|---|---|---|
| 2026 | 31 | Thursday | Saturday | 22 |
| 2027 | 31 | Friday | Sunday | 21 |
| 2028 | 31 | Saturday | Monday | 21 |
| 2029 | 31 | Monday | Wednesday | 23 |
| 2030 | 31 | Tuesday | Thursday | 23 |
January is month number 1 of 12. 31 days is 4 weeks and 3 days, so three days of the week appear five times.
See the days until January 1, every month on the days in a month page, or the 2027 calendar.