What day of the week was it?
Give any date — your birthday, an anniversary, a historic event — and this shows the weekday it landed on, worked out from the calendar itself. It also counts how many days ago the date was, a fun way to see how much time has passed.
How it's calculated
The day of the week follows a fixed pattern in the calendar, including leap-year rules, so any date maps to exactly one weekday. The tool uses your browser's date engine, which handles those rules for you.
Little curiosities
People like knowing the weekday they were born on — 'a Tuesday's child' and similar sayings come from this. Compare a few dates and you'll spot how weekdays shift by one each year, and two after a leap day.
Frequently asked questions
Does it handle old dates?
Yes, using the standard (proleptic Gregorian) calendar. Very old historical dates may differ from records that used other calendars.
Why count the days?
It turns an abstract date into a concrete number, which is oddly satisfying for birthdays and anniversaries.
How do I find what day of the week a date falls on?
Enter any date and the tool returns the weekday. It works for past and future dates, including historical ones.
What day of the week was I born?
Enter your birth date above to see the exact weekday you were born.
Does it account for leap years?
Yes. The calculation follows the Gregorian calendar and handles leap years automatically.