Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
17,879 days
From Wednesday, September 21, 1977 to Thursday, September 3, 2026.
Monday–Friday weekdays12,771
Weeks and days2,554w 1d
Calendar span48 years, 11 months, 13 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.