Date Difference Calculator
Days between two local calendar dates. If the end is before the start, the result is signed negative.
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How to count days between dates
- Pick a start date and an end date.
- Read whole days, weeks, hours (24-hour days), then years, months, and days.
- Inclusive days is whole days plus one, for counting both endpoints.
- Times of day are not part of this page. Use duration for hours and minutes.
Date difference
Civil calendar span between two dates
| Days | Whole local midnights from start to end |
|---|---|
| Y/M/D | Same span broken into years, months, and leftover days |
| Inclusive | Whole days plus one |
Days between two dates
This page counts the civil span between two YYYY-MM-DD dates on a local calendar. If the end is before the start, the day count is negative. Inclusive days is the exclusive span plus one, the usual 'both dates count' hotel or leave tally.
Years, months, and days
The Y/M/D breakdown is the same civil remainder used on the age calculator: years first, then months, then days, borrowing from the previous month when needed. It is not a 30-day commercial month or an average year of 365.25 days.
Weekends and holidays
This page does not skip weekends or public holidays. A business-day count needs a calendar this tool does not ship. Time of day and named zones belong on the time zone converter.