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.

The end date comes before the start date

147,289 days

From Wednesday, December 12, 2429 to Monday, September 7, 2026.

Monday–Friday weekdays105,207
Weeks and days21,041w 2d
Calendar span403 years, 3 months, 5 days

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