Day 259 of the year
The 259th day of 2026 is Wednesday, September 16, 2026. It was 7 days ago.
Where day 259 lands in other years
The calendar date for a given day number moves only because of leap years. In a common year day 259 is one date; from 1 March in a leap year it shifts back by one.
| Year | Date | Weekday | Leap year |
|---|---|---|---|
| 2026 | September 16 | Wednesday | no |
| 2027 | September 16 | Thursday | no |
| 2028 | September 15 | Friday | yes |
| 2029 | September 16 | Sunday | no |
| 2030 | September 16 | Monday | no |
Day 259 in context
Day 259 sits in September, on the 16th of the month, in the third quarter. By that point 258 days of the year have already gone and the year is 71.0% complete.
| Anchor | Day number | Distance from day 259 |
|---|---|---|
| 1 January | 1 | 258 days before |
| 1 April | 91 | 168 days before |
| 1 July | 182 | 77 days before |
| 1 October | 274 | 15 days after |
| 31 December | 365 | 106 days after |
Counting to and from day 259
Ordinal day numbers make in-year arithmetic trivial: the gap between two dates in the same year is just the difference of their day numbers. Day 259 minus today's day 266 gives 7 days, with no month lengths to reason about. That is exactly why batch codes, expiry stamps and flight schedules use them.
Questions
- What date is day 259 of the year?
- Wednesday, September 16, 2026.
- What weekday is it?
- A Wednesday in 2026.
- How far away is it?
- 7 days ago.
Reading the number back
To go the other way, from a calendar date to a day number, add up the lengths of the months before it and then add the day of the month. For September 16 in 2026 that is 243 days across the earlier months plus 16, giving 259. The only wrinkle is February, which is why the same date can carry two different day numbers depending on whether the year is a leap year.