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 1916-01-25 or Mar 13, 1930. You can also type words like today or yesterday, or use the American format, 1/23/2020.

Number of days between:
and  


›› January, 2020 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, January 23rd, 2020. It is the 23rd day of the year, and in the 04th week of the year (assuming each week starts on a Monday). There are 31 days in this month. 2020 is a leap year, so there are 366 days in this year.


›› Date calculator

number of days in 2020
number of days in 2019
number of days in 2021
number of days in 1936
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 April 16th, 2008 and January 23rd, 2020
number of days between January 23rd, 2020 and April 20th, 2027
number of days between February 1st, 1938 and July 18th, 2011
number of days between April 17th, 1997 and November 27th, 2003
number of days between December 24th, 1923 and April 21st, 2022
number of days between April 14th, 1945 and May 2nd, 1950
number of days between July 21st, 1918 and November 2nd, 1964
number of days between January 8th, 1927 and June 3rd, 1983
number of days between July 10th, 1906 and October 16th, 1914
number of days between July 2nd, 2028 and June 12th, 2033
number of days between March 16th, 1941 and September 12th, 1953
number of days between November 23rd, 1973 and March 31st, 1975
number of days between November 7th, 1907 and September 23rd, 1909
number of days between March 9th, 1907 and May 29th, 1921
number of days between September 28th, 1923 and December 27th, 1926
number of days between February 17th, 1903 and September 25th, 1922
number of days between May 30th, 1904 and December 26th, 1904
number of days between December 30th, 1905 and July 21st, 1923
number of days between September 22nd, 1916 and November 25th, 2019
number of days between October 30th, 1939 and September 5th, 2006
number of days between December 1st, 1942 and April 7th, 1999
number of days between May 13th, 1969 and February 19th, 2012