Dev Tools

Weekday Finder

Enter any date to find the day of the week, ISO week number, day-of-year, and what day January 1 falls on.

Select a date
Results
Day of week
Sunday
Day of year
185 of 365
ISO week number
Week 27
Jan 1, 2026 falls on
Thursday
Leap year
No
Formatted date
Sunday, July 5, 2026
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