Day of Year Calculator
Find which day of the year a date falls on, days remaining, and percent of the year elapsed.
Day of year
186
out of 365
Days remaining
179
Year elapsed
51%
Pick a date to see its ordinal day of the year (1-366), how many days remain until year end, and what percentage of the year has passed. Leap years are accounted for automatically.
How to use
- Pick a date using the date field.
- See its day-of-year number, days remaining, and percent elapsed.
- Change the date to check another day instantly.
Frequently asked questions
- Does it account for leap years?
- Yes, leap years (366 days) are detected automatically and used for the days-remaining and percent-elapsed calculations.
- What is 'day of year' used for?
- It's also called the ordinal date, commonly used in manufacturing date codes, scientific data logging, and some calendar systems.
- Can day of year be 366?
- Yes, December 31st is day 366 in leap years and day 365 in common years.