Calendar
Day of week calculator
Find the weekday for any Gregorian calendar date.
How to use this calculator
Enter Date. Find the weekday for any Gregorian calendar date. The answer updates when you change an input.
Understanding the result
The result uses the proleptic Gregorian calendar implemented by the browser platform.
Common questions
What assumptions does this result use?
Date-only input is interpreted at UTC midnight.
Are intermediate values rounded?
No. The calculation retains JavaScript number precision internally and formats only the displayed result unless the stated method requires a discrete whole value.