Day Counter
Count the days until or since any date, with an option to count weekdays only.
About the Day Counter
Pick two dates and see how many days lie between them: days until a holiday, an exam or a due date, or days since a start date or an anniversary. The calendar view shows the span, and the result is also given in weeks and days.
Weekdays-only mode skips Saturdays and Sundays, which is useful for school days or delivery times. Public holidays vary by country, so use the Business Days Calculator when you need to remove them too.
The formula
Days = later date − earlier date
- later date − earlier date
- calendar days between them, counting the end date but not the start date
How to read your result
- “Days until” counts forward from the first date; if the second date is earlier, the answer becomes “days since”.
- The first date isn't counted: from today to tomorrow is 1 day. Add 1 if you want to count both ends, as for a leave request.
Worked example
Days from 1 December to Christmas 2026
- 25 December − 1 December = 24 days
- That is 3 weeks 3 days
- Weekdays only (2 to 25 December): 18 weekdays
Things to keep in mind
- Uses the Gregorian calendar, so leap days (29 February) are included automatically.
- Counts whole dates, not times of day; use the Countdown Calculator for hours and minutes.
Questions people ask
Does it include today?
No: tomorrow is 1 day away. To count today as day 1, add one to the answer.
Can I count backwards?
Yes, put the earlier date second and it shows days since.
How many days are in a year?
365, or 366 in a leap year. Years divisible by 4 are leap years, except century years not divisible by 400 (2000 was a leap year, 2100 won't be).