Day of Year Calculator
Enter a date to see which numbered day of the year it is, and how many days remain.
Your calculation is performed in your browser.How it works
The calculator counts the exact number of calendar days from January 1 of your date's year up to and including your date, giving the day's position in the year.
Formula & methodology
Day of year = exact number of calendar days between January 1 and the chosen date, plus 1. Days remaining = total days in that year − day of year.
Worked example
December 31 is day 365 of a common year, or day 366 in a leap year.
Important notes
- —Leap years (366 days) are detected automatically, so the day count and days-remaining figure are always accurate for the specific year entered.