Find which day number of the year a date is
Find which day number of the year any date falls on, how many days remain, and what percentage of the year has passed.
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Date
Enter a date to find its day number of the year.
01
Pick a date
Defaults to today, but you can check any past or future date.
02
Read the day number
See which numbered day of the year that date is, out of 365 or 366.
03
See what's left
Days remaining in the year and the percentage already elapsed are shown too.
Frequently asked
Is day 1 January 1st?
Yes. Day of year counts from January 1st as day 1 through December 31st as day 365 (or 366 in a leap year).
Does this account for leap years?
Yes. The total for a leap year is 366 days, and that's reflected in both the day count and the percentage elapsed.
What's this useful for?
Day-of-year numbers ('ordinal dates') show up in manufacturing date codes, scheduling systems, and some file naming conventions.