Date Calculator

This free date calculator computes the difference between two dates. It can also add to or subtract from a date.

Days Between Two Dates

Find the number of years, months, weeks, and days between two dates.

Add or Subtract from a Date

About this Tool

History of the Gregorian Calendar

The Gregorian calendar is the most prevalently used calendar today. Within this calendar, a standard year consists of 365 days with a leap day being introduced to the month of February during a leap year. The months of April, June, September, and November have 30 days, while the rest have 31 days except for February, which has 28 days in a standard year, and 29 in a leap year.

Holidays

A holiday is a day that, either by custom or by law, is set aside such that regular activities like going to work or school are suspended, or at least reduced. This calculator is mainly geared towards U.S. holidays, but holidays specific to a given country can be entered manually. Certain holidays such as New Year's Day are referred to as "fixed holidays," since they fall on the same date every year. Others, such as the birthday of Martin Luther King, Jr., occur on a "floating Monday" (the third Monday of January).

2025 U.S. Federal Holidays
New Year's DayJan. 1, 2025
Martin Luther King Jr. DayJan. 20, 2025
President's DayFeb. 17, 2025
Memorial DayMay. 26, 2025
Juneteenth DayJun. 19, 2025
Independence DayJul. 4, 2025
Labor DaySep. 1, 2025
Columbus DayOct. 13, 2025
Veteran's DayNov. 11, 2025
ThanksgivingNov. 27, 2025
ChristmasDec. 25, 2025