Day 4 of the year
The 4th day of 2026 is Sunday, January 4, 2026. It was 262 days ago.
Where day 4 lands in other years
The calendar date for a given day number moves only because of leap years. In a common year day 4 is one date; from 1 March in a leap year it shifts back by one.
| Year | Date | Weekday | Leap year |
|---|---|---|---|
| 2026 | January 4 | Sunday | no |
| 2027 | January 4 | Monday | no |
| 2028 | January 4 | Tuesday | yes |
| 2029 | January 4 | Thursday | no |
| 2030 | January 4 | Friday | no |
Day 4 in context
Day 4 sits in January, on the 4th of the month, in the first quarter. By that point 3 days of the year have already gone and the year is 1.1% complete.
| Anchor | Day number | Distance from day 4 |
|---|---|---|
| 1 January | 1 | 3 days before |
| 1 April | 91 | 87 days after |
| 1 July | 182 | 178 days after |
| 1 October | 274 | 270 days after |
| 31 December | 365 | 361 days after |
Counting to and from day 4
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 4 minus today's day 266 gives 262 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 4 of the year?
- Sunday, January 4, 2026.
- What weekday is it?
- A Sunday in 2026.
- How far away is it?
- 262 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 January 4 in 2026 that is 0 days across the earlier months plus 4, giving 4. 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.