Date Difference Calculator

We use the Gregorian calendar without timezone or daylight-saving offsets. Whole months are counted from the earlier date, followed by remaining days. Missing days are clamped to the final day of the target month, such as February 29 to February 28 in a non-leap year. Total elapsed days excludes the starting day; equal dates give zero.

Values are calculated in your browser and are not sent in processing requests. General usage events may be recorded without your numbers or dates.