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 2028-12-01 or Mar 19, 1950. You can also type words like today or yesterday, or use the American format, 5/30/2016.

Number of days between:
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›› May, 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 Monday, May 30th, 2016. It is the 151st day of the year, and in the 22nd 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
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number of days in 2017
number of days in 1980
number of days in January
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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 September 17th, 1912 and May 30th, 2016
number of days between May 30th, 2016 and May 28th, 2023
number of days between March 25th, 1952 and January 5th, 2030
number of days between May 8th, 1922 and July 7th, 1976
number of days between May 3rd, 2022 and December 22nd, 2037
number of days between August 7th, 1980 and November 24th, 2017
number of days between January 24th, 1906 and March 30th, 2004
number of days between June 27th, 1958 and March 6th, 2020
number of days between May 16th, 1913 and March 17th, 1924
number of days between January 3rd, 1949 and September 28th, 1966
number of days between July 10th, 1972 and September 6th, 2010
number of days between September 26th, 1921 and April 11th, 1927
number of days between June 26th, 1939 and August 6th, 1944
number of days between December 28th, 1901 and March 4th, 1913
number of days between December 27th, 1923 and September 2nd, 1946
number of days between January 5th, 1989 and May 23rd, 2029
number of days between March 28th, 1902 and May 25th, 1911
number of days between December 17th, 1901 and October 23rd, 1902
number of days between November 9th, 1933 and July 13th, 1959
number of days between April 12th, 1918 and August 5th, 1940
number of days between January 27th, 1910 and September 22nd, 1961
number of days between July 27th, 1904 and September 6th, 1915

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