Date & Time Calculator
Day of Week Calculator
Find what day of the week any date falls on
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Inputs
Day of Week
Sunday
Day of Year
1
Week Number
1
Days Until Next
0
Is Weekend?
No
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About
Discover what day of the week any date falls on, plus additional information like day of year, week number, and weekend status.
FAQ
What is day of year?
Day of year is the sequential number of the day within a year (1-366). January 1st is day 1, December 31st is day 365 or 366.
How is week number calculated?
Week number follows ISO 8601 standard. Week 1 is the first week with a Thursday in it.
What does days until next mean?
This shows how many days until the next occurrence of that day of week (e.g., next Tuesday).
What qualifies as a weekend?
Saturday and Sunday are considered weekends in this calculator.
Can I check historical dates?
Yes. The calculator works for any valid date, past or future.