Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
17,439 days
From Tuesday, December 5, 1978 to Thursday, September 3, 2026.
Monday–Friday weekdays12,457
Weeks and days2,491w 2d
Calendar span47 years, 8 months, 29 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.