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Weekday Calculator
What day of the week was that — or will it be?
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How to Use This Tool
- Day of the week — pick any date and we'll name its weekday.
- Next occurrence — choose a weekday and a start date to find the next date that lands on it.
Frequently Asked Questions
Why is a weekday for past dates exact?
Our modern calendar (the Gregorian calendar) repeats exactly every 400 years, so historical dates since 1582 map to weekdays unambiguously.
Does it handle leap years?
Yes — February 29 is handled automatically, so the weekday stays correct across leap years.
What weekday was January 1, 2000?
It was a Saturday. Try it in the calculator — old dates work fine.
Can it find the next Friday the 13th?
Not directly, but you can pick the 13th of each month and check — or use the "next weekday" mode for plain weekday searches.
Practical Example
Your project deadline is a specific date and you want a Monday:
- Use Next date on a chosen weekday.
- Pick Monday and today's date.
- The tool gives the next Monday, skipping the weekend.
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