Day of Week Calculator
Determine the day of the week for any date in history or future. Perfect for trivia, planning events, or finding out what day you were born. Instantly calculate weekdays with detailed date information.
Day of the Week
Thursday
Thursday, December 17, 2015
3653 days ago • 10 years ago
Date Details
351
Day of Year
51
Week Number
Q4
Quarter
No
Weekend
Month: December
Days in Month: 31
Days in Month: 31
Year: 2015
Days in Year: 365
Days in Year: 365
ISO Date: 2015-12-17
Day Number: 4 (0=Sunday, 6=Saturday)
Day Number: 4 (0=Sunday, 6=Saturday)
Quick Date Lookups
How to Use
- Select a date - Use the date picker or type the date
- Click Calculate - Get instant weekday results
- View details - See week number, day of year, and more
When to Use
Personal
Birth day: Find out what day of the week you were born
Historical events: Discover the weekday of important moments in history
Planning
Event planning: Plan weddings, parties, or meetings on preferred weekdays
Holiday planning: Check if holidays fall on weekends
