Day of Week Calculator
Find out which weekday any date falls on.
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Saturday
Week 36 · Weekend · Q3
Day of week
Saturday- September 5, 2026
- Week 36 · Day 248 · Q3
- Weekend
Week 36
248
Q3
Sat/Sun
Smart Insights
How It Works
The calculator uses the Gregorian calendar to determine the exact weekday for any date. Valid for past, present, and future dates.
Frequently Asked Questions
How is the weekday determined?
Using the Gregorian calendar. The calculator works for any date after September 1752 (when the Gregorian calendar was adopted).
Can I check a past date?
Yes. Any date in the Gregorian calendar is supported.
Is the day count accurate?
Yes. The calculator uses JavaScript's native Date object which correctly handles all calendar rules including leap years.
What is 'Month Position'?
The sequential occurrence of the weekday within the month. For example, the 2nd Friday.
Can I check a future date?
Yes. Future dates are fully supported.
How are week numbers calculated?
Using the ISO-8601 standard. Week 1 is the week containing the first Thursday of the year.
Last reviewed: July 20, 2026