Days until May 31
May 31 falls on a Sunday in 2026 and a Monday in 2027. The count runs from today’s date on your device to the next May 31; pick another date to count from it instead.
- Days until May 31
- 243
From September 30, 2026, there are 243 days until May 31 on Monday, May 31, 2027.
- Date
- Monday, May 31, 2027
- Day of the week
- Monday
- In weeks
- 34 weeks and 5 days
Answer for the example date Wednesday, September 30, 2026. It changes to today's date when the page loads.
Days until May 31: 243. From September 30, 2026, there are 243 days until May 31 on Monday, May 31, 2027.
Where is May 31 on the calendar?
How to calculate
Counts the days from today, or any date you choose, to the next May 31, with its day of the week.
Example with the default inputs (Count from September 30, 2026) on the example date Wednesday, September 30, 2026: From September 30, 2026, there are 243 days until May 31 on Monday, May 31, 2027.
Method: Find the first May 31 on or after the start date, then count the days from the start date to it.
- May 31 comes every year, so the count is never more than 365 days.
- The start date itself is not counted: from the day before May 31, the count is 1; on May 31 itself, it is 0.
- Start dates from January 1, 1900 to December 31, 2400 work for the count to May 31, the range the date field accepts.
- Today is the date on your own device, so the count to May 31 changes at midnight where you are. Dates are whole calendar days, so a daylight-saving change never adds or loses a day.
Worked examples
Each example is checked against the calculator on every build.
- Count from 2027-05-31 gives Date 2027-05-31, Days until May 31 0.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-01-01 gives Date 2027-05-31, Days until May 31 150.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-06-01 gives Date 2028-05-31, Days until May 31 365.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
Other questions people ask
What day of the week is May 31?
Sunday, May 31, 2026; Monday, May 31, 2027; Wednesday, May 31, 2028. The weekday of May 31 moves on one day a year, or two when a February 29 falls between.
What day of the year is May 31?
May 31 is day 151 of a common year and day 152 of a leap year, such as 2028. Either way, 214 days of the year come after it.
What season is May 31 in?
In the Northern Hemisphere, May 31 is in spring in every year from 2026 to 2035; in the Southern Hemisphere, it is autumn. Seasons here start on the astronomical equinoxes and solstices, dated in US Eastern Time.
Is May 31 a US federal holiday?
In some years. Memorial Day, a US federal holiday that moves with the weekday, falls on May 31 in 2027, 2032, and 2038.
How are the days until May 31 counted?
From the start date to May 31, without counting the start date: from May 30 the count is 1, and on May 31 it is 0. The day after, it moves on to the next May 31: from June 1, 2026, that is May 31, 2027, 364 days away.