Day of the Week Calculator
Find out what day of the week any date falls on. Useful for planning events, historical dates, or satisfying curiosity.
How to Use This Calculator
- Select a date using the date picker.
- The calculator displays the day of the week for that date.
- Works for any date—past, present, or future.
- Use this for planning, scheduling, or historical curiosity.
Day of the Week Calculation
The calculator uses the Gregorian calendar and JavaScript Date object:
0 = Sunday
1 = Monday
2 = Tuesday
3 = Wednesday
4 = Thursday
5 = Friday
6 = Saturday
Accounts for:
- Leap years (every 4 years, except century years not divisible by 400)
- Month lengths (28-31 days)
- Gregorian calendar rules (after 1582)
Example: January 1, 2024 = Monday. The Date object automatically handles leap years, month lengths, and calendar rules. The calculation is accurate for all dates in the Gregorian calendar (after 1582). For dates before 1582, the Julian calendar was used, which had different rules.
Full Description
The Day of the Week Calculator determines what day of the week any date falls on. This is useful for planning events, scheduling, historical research, or simply satisfying curiosity. The calculator works for any date—past, present, or future—using the Gregorian calendar system.
The calculation uses JavaScript\'s Date object, which automatically handles leap years, month lengths, and calendar rules. The Gregorian calendar (used since 1582) accounts for leap years every 4 years, except century years not divisible by 400. This ensures accurate day-of-week calculations for all modern dates. For dates before 1582, the Julian calendar was used, which had slightly different leap year rules.
This calculator helps you find the day of the week for any date. Select a date, and it displays the day name. Use it to plan events, schedule meetings, find historical dates, check future dates, or satisfy curiosity about what day a specific date falls on. The calculation is accurate for all dates in the Gregorian calendar!
Frequently Asked Questions
How does the day of the week calculation work?
The calculator uses JavaScript's Date object, which automatically calculates the day of the week from the date. The Date object uses the Gregorian calendar and accounts for leap years, month lengths, and historical calendar changes. It returns a number (0-6) representing Sunday through Saturday.
Can I find the day for historical dates?
Yes! The calculator works for any date in the Gregorian calendar (after 1582). For dates before 1582, results may vary due to calendar reforms. The Gregorian calendar was introduced in 1582 to fix leap year calculations in the Julian calendar.
What about future dates?
The calculator works for future dates too! Enter any date, past or future, and it will calculate the day of the week. Useful for planning events, scheduling, or finding out what day your birthday falls on in future years.
Is this accurate for all dates?
Yes, for dates in the Gregorian calendar (after 1582). The calculation accounts for leap years (every 4 years, except century years not divisible by 400). For dates before 1582, the Julian calendar was used, which had different leap year rules.