Day of the Week Calculator
Find the day of the week for any date. Check whether a date falls on a Monday, Tuesday, or another weekday.
Day of the Week Calculator
Find the weekday for any valid calendar date.
How to find the day of the week
Select a valid calendar date and calculate its weekday. The calculator uses the Gregorian calendar to determine the result.
For example, entering 2024-01-01 returns Monday. Dates must be real calendar dates, so values such as 2024-02-30 are rejected.
Frequently Asked Questions
Which calendar does the day-of-week calculator use?
It uses the proleptic Gregorian calendar for the date you enter. Invalid calendar dates, such as February 30, are rejected.