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

248,274 days

From Monday, December 12, 1346 to Saturday, September 12, 2026.

Monday–Friday weekdays177,339
Weeks and days35,467w 5d
Calendar span679 years, 9 months

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