Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
17,789 days
From Tuesday, December 20, 1977 to Thursday, September 3, 2026.
Monday–Friday weekdays12,707
Weeks and days2,541w 2d
Calendar span48 years, 8 months, 14 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.