How this calculation was worked out
The result uses the exact inputs on this page and calendar/time arithmetic appropriate to this calculator. The result shown above is the value to use for this calculation.
Tuesday Day 245 of 365 in 2025What date is day 245 of 2025?
Day numbers by month, 2025
Month First day number Last day number January 1 31 February 32 59 March 60 90 April 91 120 May 121 151 June 152 181 July 182 212 August 213 243 September 244 273 October 274 304 November 305 334 December 335 365
Key figures
Day 245 of 2025 is Tuesday, September 2, 2025. 2025 is an ordinary year with 365 days, so this date is 120 days before the end of the year. It sits in ISO week 36, in quarter 3, and is 395 days ago. Day numbers count from January 1, which is day 1. January has 31 days, so February 1 is day 32; in a common year March 1 is day 60, and in a leap year it is day 61 because February has 29 days. The table above lists the first and last day number of every month in 2025, so you can check any result by hand. Day-of-year numbers, sometimes called ordinal or Julian dates, are used in logistics, military and aviation records, satellite data, manufacturing lot codes and food packaging. The format YYYY-DDD, for example 2025-245, is part of the ISO 8601 standard. Note that the ‘Julian date’ used by astronomers is a different system. Take the last day number of the month before and add the day of the month: the previous month ends on day 243, and 2 more days gets you to day 245.The answer
How the day number is found
Ordinal dates in practice
Checking your answer
Tuesday, September 2, 2025. Tuesday. No, it has 365 days. 120. Week 36 of 2025. Quarter 3. 67.1%. Wednesday, January 1, 2025.Frequently asked questions
What date is day 245 of 2025?
What day of the week is day 245 of 2025?
Is 2025 a leap year?
How many days are left in 2025 after day 245?
What ISO week is day 245 in?
Which quarter is it in?
What percentage of 2025 has passed by day 245?
What is day 1 of 2025?
Day 245 of 2025: September 2, 2025 Tuesday — Day 245 of 365 in 2025
The result uses the exact inputs on this page and calendar/time arithmetic appropriate to this calculator. The result shown above is the value to use for this calculation.
=DATE(A2,1,B2)Put the year in A2 and day number in B2.
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