Find how many calendar days separate two dates, with an option to count both dates.
Examples & helpCompleted months and years count same-day anniversaries. 31 January to 28 February is zero completed months, but crosses one month boundary. For a leap-day start, a completed year requires reaching March in a non-leap year. Reversed ranges use the same magnitude with a negative sign.
These are calendar days, so daylight-saving changes do not add or remove a day. By default, the start date is excluded: Monday to Tuesday is one day. Count both dates for a two-day inclusive range. If the end date comes first, the result clearly says “earlier”.
Use a date difference to plan a trip, measure a project or find how many days remain until an event. This calculator counts Gregorian calendar dates. A calendar-day count does not require a birth time, clock time or time zone.
The two steps are February 28 to February 29, then February 29 to March 1. An inclusive count also includes the starting date.
The gap is useful for nights away or elapsed calendar days. Count both dates when you need to list every day an activity touches.
Yes. For a forward range, the inclusive count is the date gap plus one. A range that starts and ends on the same date has a gap of zero days but contains one date.
No. This tool counts calendar dates, not hours. Two consecutive local midnights can be separated by 23 or 25 hours around a clock change. Use a time-zone-aware countdown when you need elapsed hours.
Use Count working days for that. The calendar-day tool includes every date, including weekends and February 29. Reversing the dates gives a negative gap; the inclusive total remains a positive count of dates.