Tool to make calculation with dates. Date can be computed with additions or subtractions of days, weeks, months or years with a given date.
Calculation with Dates - dCode
Tag(s) : Date and Time
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It is very used for countdowns before an event, or to calculate an age in number of days.
Example: 135 days before the next Olympic Games
dCode locate the day, month and year in a reference calendar and add or subtract the number of days required for the initial date to calculate the new date.
Example: To determine when somebody had/will have 10,000 days, add 10000 days to the date of birth.
Calculation uses the Gregorian Calendar and the Julian one before 1582.
To add days in Excel, add an integer to a date.
Example: 2010/01/01 + 1 = 2010/01/02
To add months, use the function EDATE
Example: EDATE("01/01/2010",1) = 2010/02/01
Reminder : dCode is free to use.
The copy-paste of the page "Calculation with Dates" or any of its results, is allowed as long as you cite dCode!
Cite as source (bibliography):
Calculation with Dates on dCode.fr [online website], retrieved on 2022-09-30,