Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,710 days
From Sunday, December 16, 1635 to Monday, September 7, 2026.
Monday–Friday weekdays101,936
Weeks and days20,387w 1d
Calendar span390 years, 8 months, 22 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.