Find Day of Any Date
Find what day of the week any date falls on, past or future. Perfect for planning and historical research.
Find Day of Any Date
About Day of Week Calculations
Our day of week calculator uses advanced algorithms to determine what day any date falls on, including historical dates before the Gregorian calendar reform and future dates far into the future.
Key Features:
- Historical Accuracy: Accounts for calendar reforms and leap years
- Wide Date Range: Works for dates from year 1 to 9999
- Calendar View: Visual representation of the month
- Context Information: Historical and cultural significance
- Pattern Analysis: Shows how dates repeat across years
Common Use Cases:
- Historical research and genealogy
- Event planning and scheduling
- Academic and educational projects
- Curiosity about significant dates
- Birthday and anniversary planning
Calendar Note: Dates before October 15, 1582 use the Julian calendar.
The Gregorian calendar reform created a 10-day shift to correct for accumulated errors.
Quick Searches
Day Statistics
Monday: Most productive day, "Blue Monday"
Tuesday: Named after Mars (Tyr's day)
Wednesday: "Hump day" - middle of work week
Thursday: Named after Thor (Jupiter's day)
Friday: End of work week, TGIF!
Saturday: Saturn's day, weekend begins
Sunday: Sun's day, day of rest
Calendar Systems
Current international standard, introduced by Pope Gregory XIII in 1582.
Introduced by Julius Caesar in 46 BC, used until Gregorian reform.
Related Tools
Fun Facts
- The same date occurs on the same day every 11 years
- Friday the 13th occurs 1-3 times per year
- Leap years have 366 days instead of 365
- February had 30 days in some ancient calendars