Days Between Dates
Count the days between two dates, with years, months and weeks, and the weekdays and weekends in between.
Counts the days between two dates and shows the same span as years, months and days, in weeks, and split into weekdays and weekend days. The dates can be in either order.
How the days are counted
The count runs from the start date up to the end date, the way subtracting one date from another does: from 1 to 31 January is 30 days. Include end date counts the end date too, adding one day, which suits questions like “how many days does this booking cover”. The start date is always counted.
Years and months are counted anniversary by anniversary from the start date, and the remaining days run from the last monthly anniversary. When a month is too short for the day, the anniversary falls on its last day: one month after 31 January is 28 February. Weekdays are Monday to Friday; hours, minutes and seconds are whole days of 24 hours, so a daylight-saving change inside the span does not alter them.
Examples
The first quarter of 2026
From 1 January to 31 March 2026, counting both dates, is 90 days — 3 months — of which 64 are weekdays and 26 fall on weekends.
Forty weeks from 1 January 2026
8 October 2026 is 280 days after 1 January 2026, with the end date not included: exactly 40 weeks, or 9 months and 7 days.
Across 29 February
From 29 February 2024 to 28 February 2025, end date not included, is 365 days, which counts as 1 year: in a year without 29 February, the anniversary falls on 28 February.
Frequently asked questions
See also
- Date Calculator — to find the date a number of days, weeks or months away.
- Working Days Calculator — to count working days, with any weekend and public holidays left out.
- Age Calculator — to measure an age, with the next birthday.