Day of the Year
July 15 is day 196 of the year, with 169 days left (53.7 percent complete). This day of the year calculator finds the day number for any date, plus the days remaining and the percentage of the year that has passed, with leap-year support.
Quick answer
The day of the year is the number of days from January 1 up to and including the chosen date.
What this tells you
- •The day of the year is the number of days from January 1 up to and including the chosen date.
- •In a regular year, the count runs from 1 to 365. In a leap year, it runs from 1 to 366.
- •Use this to track progress through the year or find how many days remain.
How to Use
- 1Enter any date.
- 2Click Calculate to get the day of the year.
- 3Read the result: the number tells you which day of the year it is, out of 365 or 366.
How It Works
Formula
Day of year = number of days from January 1 to the given date, inclusive.The calculator counts the calendar days from the start of the year. It accounts for leap years automatically, so February 29 adds one day to the count. The percentage is the day of the year divided by the total days in the year, shown as a percentage.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
July 15, 2026
July 15 is the 196th day of a 365-day year. With 169 days remaining, the year is just over half complete.
February 29, 2024 (leap year)
In a leap year, February 29 is day 60 of 366. The total year is one day longer than usual.
Day of the Year by Month Start (Non-Leap Year)
The day-of-year number for the first day of each month.
| Month | Day 1 is Day # | Days in Month |
|---|---|---|
| January | 1 | 31 |
| March | 60 | 31 |
| June | 152 | 30 |
| September | 244 | 30 |
| December | 335 | 31 |
Common mistakes
- Forgetting about leap years when calculating days manually. February has 29 days in a leap year, which shifts every day after February 28 by one.
- Counting the start date incorrectly. January 1 is day 1, not day 0. December 31 is day 365 or 366.
- Mixing up day-of-year with week-of-year. Day of the year is a number from 1 to 366, while weeks run from 1 to 52 or 53.