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# Calculate the Number of Days

Calculator for the number of days between one date and another. Please enter start and end date, the number of days between will be calculated. If the start date is taken into account, then e.g. today and tomorrow are two days. If not, then from today to tomorrow it is one day. Start or End date today enters the current date into the according line. If the end date is before the start date, the number of days is negative.
The number of days is an exact value. Therefore the number of months or years can't be calculated here, because those have alternating lengths.

Start date: / /

Enddatum: / /

Number of days:

Example: from January 1st of the previous year to January 1st of this year there are 365, 366 or 367 days. If the previous year was not a leap year and the start date is not counted, then there are 365 days. A counted start date and a leap year each increase the number of days by one.
Another example: from September 1st 1999 to February 11th 2030 there are 11121 days without the start date. If you want to know the number of days between these two dates, you simply subtract 1 again, so there are 11120 days between them. Since this method of counting is less common, there is no special setting for this.

Specifying a longer period of time only in days is not particularly understandable, since we are used to calculating such periods of time in years. However, this information is accurate as long as you do not take into account calendar changes, such as the change from the Julian calendar to the Gregorian calendar starting in 1582. This calculator only works with the dates of the Gregorian calendar, which is currently in use.

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