How to find the weekday of a date in 3 easy steps
- 1
Pick any date
Past, present, or future.
- 2
Read the weekday
The day of the week appears instantly.
- 3
See the extras
Day of year, ISO week, and days to year end.
Why use the day of week calculator tool from Super Utility Hub?
Was your birthday on a Friday? What weekday does next month's deadline fall on? The day of week calculator answers instantly for any date, past or future.
Alongside the weekday, it reports the day of year, ISO week number, and days remaining in the year.
- Processes everything in your browser — no upload servers involved
- Free forever with unlimited uses
- Works on Windows, macOS, Linux, Android and iOS
- No watermark or branding on your output, ever
Frequently asked questions
Does it handle dates before 1900?
Yes — the underlying calendar math covers any date the browser can represent, including the 1800s.
What is the day of year?
The ordinal day within the year: January 1 is day 1, December 31 is 365 (or 366 in leap years).
Why do I need the ISO week?
Project managers and payroll run on ISO weeks. This tool reports the week number alongside the weekday.