Summary
Find the weekday name and number for a calendar date.
Calculation details
Sunday is 0 and Saturday is 6 in this numbering.
Formula
Weekday = UTC day-of-week for the entered date.
Worked example
Worked example
July 30, 2026 is a Thursday.
How it works
Enter a calendar date. The weekday uses UTC day-of-week numbering (Sunday = 0).
Frequently asked questions
What weekday names are shown?
English weekday names derived from the UTC calendar date you enter.
Why might this differ from my phone calendar?
If your phone shows a local date that has already rolled past UTC midnight, enter the calendar date you intend explicitly.
Is this useful for scheduling?
Yes, for confirming which weekday a deadline falls on before inviting attendees.