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

40,435 days

From Tuesday, December 21, 1915 to Friday, September 4, 2026.

Monday–Friday weekdays28,883
Weeks and days5,776w 3d
Calendar span110 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.