Calculate what day of the year any date falls on. Instantly see the day number, days remaining in the year, week number, and leap year status. Free online tool — 100% client-side.
The Day of Year Calculator tells you exactly what day number any calendar date falls on — for example, January 1st is day 1, February 1st is day 32 (or 33 in a leap year), and December 31st is day 365 (or 366). It also shows how many days are left in the year, the ISO week number, and whether the year is a leap year. All calculations happen instantly in your browser with complete privacy.