DATE TOOLS
Day of the Week
Find which day of the week any date falls on.
Pick any date above — centuries ago or far in the future.
How to use the Day of the Week
- Pick any date — a birthday, a historical event or a future deadline.
- The tool shows the weekday, plus the ISO week number and day of the year.
- It also lists the weekday the same date falls on in the next few years — handy for planning birthdays and anniversaries.
Frequently asked questions
How far back does it work?
It uses the proleptic Gregorian calendar for every date, so it's exact for any date since the Gregorian calendar was adopted in 1582. Earlier dates follow the Gregorian rules, which may differ from the Julian dates used at the time.
Why does a date move by one weekday each year?
A common year is 52 weeks and 1 day, so most dates shift forward one weekday a year — and two after 29 February.