Date & Time calculator
Day of Week Calculator
Find which weekday a date falls on, with a selected-date check and simple calendar notes.
FormulaWeekday is read from the selected Gregorian calendar date
Formula
Weekday lookup
For legal, payroll, travel, or filing deadlines, confirm the date in the timezone and jurisdiction that applies.
Weekday is read from the selected Gregorian calendar date
Enter 2026-07-10 to see that the date falls on a Friday.
FAQ7 common questions for this calculator.
FAQs
Can I check a past date?+
Yes. Enter any supported date to see the weekday.
Does timezone matter?+
For ordinary calendar dates it usually does not, but deadlines around midnight should be checked in the relevant timezone.
Which calendar does it use?+
The calculator uses the modern Gregorian calendar date handled by the browser.
How does the Day of Week Calculator calculate the result?+
For the Day of Week Calculator, it uses the Weekday lookup: Weekday is read from the selected Gregorian calendar date. Enter 2026-07-10 to see that the date falls on a Friday.
What information do I need to use the Day of Week Calculator?+
For the Day of Week Calculator, enter the relevant dates, times, timezone, or calendar settings requested by the form. Exact dates matter because month lengths, leap years, and boundary days can change the result.
How accurate is the Day of Week Calculator?+
Day of Week Calculator is accurate for the values and assumptions entered on this page. It uses the Weekday lookup. Recheck the inputs before relying on the estimate.
What should I check before using the Day of Week Calculator result?+
For the Day of Week Calculator, check the date and time fields, date format, timezone, daylight-saving changes, inclusive or exclusive endpoints, and whether weekends or holidays should count.
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Date & Time guide
How to use the Day of Week Calculator
Find which weekday a date falls on, with a selected-date check and simple calendar notes. The page also explains the weekday lookup and shows a practical example: Enter 2026-07-10 to see that the date falls on a Friday.
- 1
Enter your details
Enter a selected-date check and simple calendar notes, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the weekday lookup: Weekday is read from the selected Gregorian calendar date.
- 3
Compare scenarios
Change one or more inputs to see how they affect the day of Week Calculator result before you use the estimate.