Day-of-year to date converter
Turn a year and ordinal day 1–365 or 366 into a date.
Preparing your tool…
How it works
Day 1 is 1 January. Validate the ordinal against the actual leap-year length.
Example
Day 60 of 2028 is 2028-02-29.
What should I check before using the result?
This ordinal format is different from the astronomical Julian Date.