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 1973-06-14 or Dec 22, 1934. You can also type words like today or yesterday, or use the American format, 8/25/2016.

Number of days between:
and  

I'm feeling lucky, show me a random date difference.


›› August, 2016 calendar

Su M Tu W Th F Sa
  1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31    

Today is Thursday, August 25th, 2016. It is the 238th day of the year, and in the 34th week of the year (assuming each week starts on a Sunday). There are 31 days in this month. 2016 is a leap year, so there are 366 days in this year.


›› Date calculator

number of days in 2016
number of days in 2015
number of days in 2017
number of days in 1913
number of days in January
number of days in February
number of days in March
number of days in April
number of days in May
number of days in June
number of days in July
number of days in August
number of days in September
number of days in October
number of days in November
number of days in December
number of days between November 2nd, 2014 and August 25th, 2016
number of days between August 25th, 2016 and October 26th, 2021
number of days between July 21st, 1935 and June 30th, 1952
number of days between September 3rd, 1905 and August 16th, 1956
number of days between February 9th, 1906 and December 9th, 1921
number of days between June 4th, 1959 and November 12th, 1962
number of days between September 6th, 1904 and May 16th, 1918
number of days between May 7th, 1908 and February 8th, 1949
number of days between May 20th, 1986 and January 18th, 2012
number of days between November 5th, 1907 and August 18th, 1910
number of days between February 2nd, 1954 and November 16th, 1972
number of days between February 20th, 1935 and December 21st, 1967
number of days between September 25th, 1943 and July 11th, 1946
number of days between June 23rd, 1909 and June 3rd, 2032
number of days between January 21st, 1912 and February 5th, 1933
number of days between May 13th, 1939 and April 20th, 1981
number of days between July 9th, 1933 and August 9th, 1957
number of days between September 1st, 1977 and December 28th, 1998
number of days between July 29th, 1905 and July 16th, 1933
number of days between September 13th, 1945 and May 30th, 2017
number of days between December 13th, 1914 and November 16th, 1945
number of days between May 30th, 1921 and November 4th, 1945

This page was loaded in 0.0023 seconds.