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

39,815 days

From Saturday, September 1, 1917 to Friday, September 4, 2026.

Monday–Friday weekdays28,440
Weeks and days5,687w 6d
Calendar span109 years, 3 days

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