Day of Week Calculator

Q: "What day of the week was a given date?"

"Enter the date. The calculator returns the weekday (e.g. Monday, Tuesday) using the Gregorian calendar."

Q: "What date format can I use?"

"Use YYYY-MM-DD (ISO) or your locale format (e.g. MM/DD/YYYY or DD/MM/YYYY)."

Q: "Does it work for past and future dates?"

"Yes. Any date in the Gregorian calendar is supported."

Q: "What about dates before 1582?"

"The Gregorian calendar started in 1582. Dates before that may be shown in \"proleptic\" Gregorian (calendar applied backwards)."

Q: "Is daylight saving considered?"

"No. This is calendar date only. No time zone or DST."

Find the weekday for any date. Example: Jan 1, 2025 → Wednesday. Copy result.

Day of week tells you which weekday (Monday, Tuesday, …) a date falls on. Enter the date in YYYY-MM-DD or your locale format. The calculator uses the Gregorian calendar. Copy the result or Copy with labels.

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Examples

Jan 1, 2025 → Wednesday
July 4, 1776 → Thursday
Dec 25, 2024 → Wednesday

FAQ

What day of the week was a given date?

Enter the date. The calculator returns the weekday (e.g. Monday, Tuesday) using the Gregorian calendar.

What date format can I use?

Use YYYY-MM-DD (ISO) or your locale format (e.g. MM/DD/YYYY or DD/MM/YYYY).

Does it work for past and future dates?

Yes. Any date in the Gregorian calendar is supported.

What about dates before 1582?

The Gregorian calendar started in 1582. Dates before that may be shown in "proleptic" Gregorian (calendar applied backwards).

Is daylight saving considered?

No. This is calendar date only. No time zone or DST.