Is the end date included in the count?

The day count is the nights between the two dates: Monday to the next Monday is 7, and 1 September to 30 September is 29. If you want both dates counted, add one. The weekday and weekend-day rows do count both dates, because "how many working days in September" means the 1st through the 30th, and the label under each figure says which convention it uses.

How are the months worked out?

Whole calendar months first, by the same rule as adding a month: 31 January to 28 February is one month and no days, because 31 January plus one month is 28 February. Whatever is left after the last whole month is shown as days. Dividing by an average month length of 30.44 days is where most calculators go wrong.

What if the end date is before the start?

The span is counted backwards and the page says so. Swap the two dates if you would rather read it the other way round.

Does daylight saving change the answer?

No. Both dates are calendar dates, not clock times, so a day stays a day across a clock change. For hours and minutes between two moments on a clock, use the duration calculator.

How do I calculate years, months and days between dates?

Whole calendar months are counted first under the stated month-end rule. The whole-month count is grouped into twelve-month years and remaining months, with leftover calendar days. January 31, 2024 to March 2, 2025 gives one year, one month and two days. This is a calendar decomposition, not days divided by average month/year lengths.

How do I count days since a past date?

Enter your past date in Start and choose End today. That fills End with the date on your device. For a historical interval, supply both dates manually. Dates are not saved.

Does this remove public holidays or calculate a clock-time interval?

Its weekday count removes Saturdays and Sundays only and includes both dates. The existing Business Days Calculator offers supported holiday regions and inclusion choices. Duration Calculator accepts clock times alongside date endpoints; this page uses calendar dates without timezone or daylight-saving elapsed-hour adjustments.

Days Between Two Dates

Count the days between two dates, then see the span as weeks and days, calendar months and days, and years, months and days. Weekdays and weekend days are shown separately. Enter a past start date and choose End today to count days since that date. Days counts calendar nights: September 1 to September 30 is 29. Weekday and weekend counts include both endpoints, so those rows total 30.

Days betweenLoading today's date.

Mode

Start

End

Adding a month keeps the day number when it can. 31 January plus one month is 28 February (29 in a leap year), and the line under the result says when that happened instead of rolling quietly into March. Weekday counts drop Saturdays and Sundays only. For public holidays use the business days calculator; for hours and minutes between two moments, the duration calculator.

Common questions

Is the end date included in the count?: The day count is the nights between the two dates: Monday to the next Monday is 7, and 1 September to 30 September is 29. If you want both dates counted, add one. The weekday and weekend-day rows do count both dates, because "how many working days in September" means the 1st through the 30th, and the label under each figure says which convention it uses.
How are the months worked out?: Whole calendar months first, by the same rule as adding a month: 31 January to 28 February is one month and no days, because 31 January plus one month is 28 February. Whatever is left after the last whole month is shown as days. Dividing by an average month length of 30.44 days is where most calculators go wrong.
What if the end date is before the start?: The span is counted backwards and the page says so. Swap the two dates if you would rather read it the other way round.
Does daylight saving change the answer?: No. Both dates are calendar dates, not clock times, so a day stays a day across a clock change. For hours and minutes between two moments on a clock, use the duration calculator.
How do I calculate years, months and days between dates?: Whole calendar months are counted first under the stated month-end rule. The whole-month count is grouped into twelve-month years and remaining months, with leftover calendar days. January 31, 2024 to March 2, 2025 gives one year, one month and two days. This is a calendar decomposition, not days divided by average month/year lengths.
How do I count days since a past date?: Enter your past date in Start and choose End today. That fills End with the date on your device. For a historical interval, supply both dates manually. Dates are not saved.
Does this remove public holidays or calculate a clock-time interval?: Its weekday count removes Saturdays and Sundays only and includes both dates. The existing Business Days Calculator offers supported holiday regions and inclusion choices. Duration Calculator accepts clock times alongside date endpoints; this page uses calendar dates without timezone or daylight-saving elapsed-hour adjustments.

Dates are calendar arithmetic on the civil calendar, so daylight saving never shifts a result. Adding a month lands on the same day number when it exists and the last day of the month when it does not, and the page says which happened. Weekday counts exclude Saturdays and Sundays only; public holidays are not known.