Date-to-date calculator

Days between dates

Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.

Excluding the start date

16,696 days

From Wednesday, December 17, 1980 to Thursday, September 3, 2026.

Monday–Friday weekdays11,926
Weeks and days2,385w 1d
Calendar span45 years, 8 months, 17 days

Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.