This site provides an online date calculator to help you find the difference in the number of days between any two calendar dates. Simply enter the start and end date to calculate the duration of any event. You can also use this tool to determine how many days have passed since your birthday, or measure the amount of time until your baby's due date. The calculations use the Gregorian calendar, which was created in 1582 and later adopted in 1752 by Britain and the eastern part of what is now the United States. For best results, use dates after 1752 or verify any data if you are doing genealogy research. Historical calendars have many variations, including the ancient Roman calendar and the Julian calendar. Leap years are used to match the calendar year with the astronomical year.

Note: If you're trying to figure out the date that occurs in X days from today, switch to the Days From Now calculator instead. Or to calculate the date that is X days from a particular date, use the Days From Date calculator. Finally, if you want to choose a day in the week and count how many times it occurs in a given year, try out the How Many Days calculator.


›› Enter dates

Enter two dates below to find the number of days between them. For best results, avoid entering years before 1753. Examples include 1943-04-12 or May 18, 2025. You can also type words like today or yesterday, or use the American format, 4/30/2016.

Number of days between:
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›› April, 2016 calendar

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Today is Saturday, April 30th, 2016. It is the 121st day of the year, and in the 17th week of the year (assuming each week starts on a Sunday). There are 30 days in this month. 2016 is a leap year, so there are 366 days in this year.


›› Date calculator

number of days in 2016
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number of days in April
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number of days between May 30th, 1976 and June 23rd, 2004
number of days between February 6th, 1909 and March 15th, 1930
number of days between September 2nd, 1982 and October 16th, 1991
number of days between August 23rd, 1905 and August 19th, 1906
number of days between April 16th, 1955 and May 27th, 1963
number of days between April 4th, 1999 and May 24th, 2030
number of days between January 3rd, 1905 and December 13th, 1905
number of days between October 3rd, 1909 and April 16th, 1910
number of days between February 20th, 1907 and May 19th, 1963
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number of days between June 28th, 1960 and March 20th, 2027
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