P1 · Date & Time · Processed in your browser
Date Calculator
Compare a start date and end date and see both the total interval and its calendar breakdown. Your data is processed in your browser.
How to use
- Enter the start date.
- Enter an end date equal to or later than the start.
- Calculate the interval to see total days, weeks, and calendar difference.
How it works
Total days use UTC dates to avoid daylight-saving effects. The calendar interval counts complete years first, then complete months, then remaining days.
Notes and limitations
- This version does not calculate holidays or business days.
- The end date must be equal to or later than the start date to keep the result unambiguous.
Frequently asked questions
Can daylight saving time change the day count?
No. Calendar dates are compared in UTC without local clock time.