Choose a start date and an end date and the calculator returns the gap in days, weeks, months and hours, plus the number of working days and weekends inside it. Today is Wednesday, September 30, 2026. From January 1 to today is 272 days, and from today to December 31 is 92 days.
People use a date duration calculator to check the length of a contract, a notice period, a pregnancy week, a visa stay, a warranty, a school term or the time between two events. Because it uses real calendar dates, month lengths and leap days are handled for you and there is no need to count on a wall calendar.
The result is the number of midnights between the two dates, so the start day is not counted and the end day is. The breakdown into years, months and days follows calendar months rather than a fixed 30 days, and the working-day figure counts Monday to Friday before holidays.
This year so far, the second half of the year, and the days between January 1 and Christmas all have their own pages in the list below, so you can jump straight to a common answer.
Today is Wednesday, September 30, 2026. That is day 273 of 365 in 2026, in ISO week 40, with 92 days to go before the year ends. The next dates people plan around are Diwali on Saturday, October 10; Columbus Day on Monday, October 12; Halloween on Saturday, October 31. The moon is a Waning Gibbous tonight, with about 81% of its face lit. All of these figures are recalculated when the page loads, so they always describe the day you open it, not the day the page was published.
The Gregorian calendar has twelve months of 28 to 31 days. A normal year has 365 days and a leap year has 366, with the extra day added to February in every year divisible by four except century years that are not divisible by 400. Because 365 is one more than 52 weeks, most dates move forward one weekday each year and two after a leap day. Weeks are numbered under ISO 8601, which starts weeks on Monday and gives week 1 to the week containing the first Thursday of January.
Enter the start and end dates in the boxes above and press Calculate.
The end date is counted and the start date is not, so a range from Monday to Tuesday is one day.
Yes, February 29 is counted whenever it falls inside the range.
Yes. Enter the later date first or last; the calculator reports the size of the gap either way.
Yes, the result page lists Monday to Friday days and weekend days separately.
Yes, as complete calendar months plus leftover days.
The result shows complete weeks and the leftover days.
No. The dates are only used to build the address of the result page.
The site's time zone, -04:00.
It is a good check, but always confirm legal deadlines against the wording of the contract.