How does the Date to Day of Week work?

JavaScript Date parses the date string Then: getDay() returns 0 (Sunday) through 6 (Saturday) Then: The Gregorian calendar repeats every 400 years Then: Any date in history or future can be calculated precisely.

Can you give an example of how to use the Date to Day of Week?

Example: Input January 1, 2000 gives a result of Saturday.

Is the Date to Day of Week free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Date to Day of Week?

Our Date to Day of Week uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Date to Day of Week

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A date to day of week calculator determines which day of the week any calendar date falls on. Uses the Doomsday algorithm or JavaScript's built-in Date object for instant results.

Symbol	Name	Unit	Description
date	Date	YYYY-MM-DD	Input date
weekday	Day of week	text	Monday, Tuesday, ..., Sunday

January 1st Year	Day
2024	Monday
2025	Wednesday
2026	Thursday
2027	Friday
2028	Saturday (leap)
2029	Monday

References

›Doomsday algorithm — Wikipedia

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Date to Day of Week

Date to Day of Week

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Date to Day of Week