Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
17,061 days
From Tuesday, December 18, 1979 to Thursday, September 3, 2026.
Monday–Friday weekdays12,187
Weeks and days2,437w 2d
Calendar span46 years, 8 months, 16 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.