Date Difference Calculator.

A little context.

Subtracts UTC calendar-day values to avoid daylight saving differences. Negative values mean the end date is earlier. Years use an average length of 365.2425 days.

Try an example

How to use this tool

1. Enter start date, end date in the workspace above.
2. Select Run tool to process your input. Invalid values produce a message next to the form.
3. Copy the result or download it as a file. Reset example restores the original input.