Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,706 days
From Thursday, December 20, 1635 to Monday, September 7, 2026.
Monday–Friday weekdays101,932
Weeks and days20,386w 4d
Calendar span390 years, 8 months, 18 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.