How the date difference calculator works
Pick two dates and the tool gives you the gap in three ways: as years, months and days; as total months, weeks and days; and as working days. The calendar-style answer counts whole years first, then whole months, then the leftover days. The plain day count simply counts every midnight between the two dates, so it is not thrown off by leap years or daylight saving changes in other countries.
Working days
Work weeks differ around the world: most offices take Saturday and Sunday off, some shops only close on Sunday, and some Gulf employers use Friday and Saturday. Pick the weekend that matches your job and the tool skips those days. You can also count Friday as a half day if your office closes early. Public holidays such as Eid, Christmas or national days vary by country and year, so subtract them yourself.
Add or subtract time
Switch to "Add or subtract" to find a date such as 90 days from today, 6 months before an exam, or 10 working days from a courier booking. If the target month is shorter, the last day of that month is used.
- Check a probation or notice period end date.
- Count days left before a visa, passport or insurance expires.
- Plan a project, pregnancy or fee instalment schedule.
Frequently asked questions
Is the end date counted?
By default no, so 1 Jan to 2 Jan is 1 day. Tick 'Include the end date' if you want both days counted, for example for a leave application or hotel stay where both days count.
How are working days counted?
Choose which days are your weekend. Every other day between the two dates counts as a working day, starting from the start date. Public holidays are not known to the tool, so subtract them yourself.
What happens when I add a month to 31 January?
There is no 31 February, so the tool uses the last day of that month: 28 February, or 29 in a leap year. The same rule is used for years starting on 29 February.
Why do the months and days look different from the total days?
Months have different lengths. 'Years, months, days' is a calendar-style answer, while total days is a plain count of the days between the two dates.