Weekday Calculator

UTC. The date is read as a UTC civil date and the weekday is the UTC weekday. A time of day is not accepted. If you have a timestamp, take the UTC date first. 6 November 2026 is Friday. 1 January 2024 is Monday. 1900-02-29 is rejected because 1900 is not a leap year, which matches the leap year checker. English names only.

6 November 2026 is a Friday in UTC. 1 January 2024 is a Monday. Both dates exist, so both are accepted. 1900-02-29 is rejected because 1900 is not a leap year. The rejection is the same rule as the leap-year page, applied by the calendar rather than by a yes or no. UTC is used so a laptop in one zone and a laptop in another name the same weekday for the same date. A time of day is not accepted. If you have a timestamp, take the date in UTC first, then type it. The weekday names are English. There is no locale switch.

Friday and Monday are the two samples. Both are UTC. If a wall calendar in your city says a different weekday, you are looking at a different date or a different calendar system. This page is the proleptic Gregorian date you typed, at UTC. It will not shift the day because you live west of Greenwich. Take the civil date you mean, in the zone you mean, and type that date. Do not type a timestamp and expect the tool to drop the time. It will reject the string. 29 February is accepted only when the leap-year rule says the year has that day. That is the link between the two pages.

The weekday is computed in UTC from the date you type. 2026-11-06 is a Friday. 2024-01-01 is a Monday. Both dates exist, so both are accepted. The form expects year, month and day with hyphens. A time of day is rejected. If you have a timestamp, drop the time in UTC first, then type the date. A laptop in another zone does not change the answer, because the page never applies a zone. If a wall calendar disagrees, you are looking at a different civil date. 1900-02-29 is rejected because 1900 is not a leap year. The leap-year page says no for 1900 and yes for 2000 and yes for 2024. Use that page when you want the year rule in words, and use this page when you want the weekday of a real date. Invalid months and invalid days are rejected the same way. Reset restores 2026-11-06, the Friday example. Change it to 2024-01-01 for the Monday example. The names are English. There is no locale list.

Memorise the two dates as sentences: 6 November 2026 is a Friday, and 1 January 2024 is a Monday, both in UTC. Type them exactly with hyphens. If the name changes, you typed a different date. The page does not apply a time zone and it does not accept a clock time. Drop the time yourself, in UTC, before you type. A rejected 29 February means the leap-year rule said that year has no such day. Check the year on the leap-year page, then return here with a date that exists. English weekday names are the only names this form prints. Reset returns the Friday date so you can repeat the first sample without retyping it.

6 November 2026

Inputs: Date: 2026-11-06

Leave the date as 2026-11-06 and press Find. The weekday is Friday.

Result: Date: 2026-11-06 Weekday: Friday The weekday is computed in UTC, so it does not depend on a time zone.

1 January 2024

Inputs: Date: 2024-01-01

Change the date to 2024-01-01 and press Find. The weekday is Monday.

Result: Date: 2024-01-01 Weekday: Monday The weekday is computed in UTC, so it does not depend on a time zone.

What day is 6 November 2026?

Friday, in UTC.

What day is 1 January 2024?

Monday, in UTC.

Why is 29 February 1900 rejected?

1900 is not a leap year, so that date does not exist.

Does the time zone matter?

No. The weekday is computed in UTC from the date you type.

Can I include a time?

No. Type the date only.

Is the date uploaded?

No. The weekday is computed in the browser.