Day of the Week Calculator (What Day Was It?)
Day of the week calculator: find what day of the week any date was or will be — your birthday, a historic event or a future appointment.
any date → weekday
How to use this calculator
- Type your input in the box.
- The result updates as you type.
- Use “Copy result” or “Copy link” to share it.
Uses the Gregorian calendar. It also shows the ISO week number, the day of the year and whether it is a leap year.
Frequently asked questions
What day was January 1, 2000?
A Saturday.
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