Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
21,808 days
From Tuesday, December 20, 1966 to Friday, September 4, 2026.
Monday–Friday weekdays15,578
Weeks and days3,115w 3d
Calendar span59 years, 8 months, 15 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.