How many days are in May?

Q: How many days are in May?

31 days. May 2026 runs from Friday, May 1, 2026 to Sunday, May 31, 2026: 31 days in all, 21 of them weekdays and 10 weekend days. One federal holiday falls inside it — Memorial Day (May 25, 2026) — so 20 working days are left once those are taken off. Both end days are counted, which is how a calendar counts a month rather than how a date difference counts one. Business days here are Monday to Friday; federal holidays are listed separately because private employers do not all take the same ones.

May 2026 has

31 days

Counted from Thursday, September 10, 2026. The figures are for May 2026; the table below carries them forward.

Days: 31
Weekdays: 21
Weekend days: 10
That is: 4 weeks and 3 days

May 2026 runs from Friday, May 1, 2026 to Sunday, May 31, 2026: 31 days in all, 21 of them weekdays and 10 weekend days. One federal holiday falls inside it — Memorial Day (May 25, 2026) — so 20 working days are left once those are taken off. Both end days are counted, which is how a calendar counts a month rather than how a date difference counts one. Business days here are Monday to Friday; federal holidays are listed separately because private employers do not all take the same ones.

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Result

31 days

Days: 31
Weeks and days: 4 weeks, 3 days
Months and days: 0 months, 30 days
Business days (Mon–Fri): 21Weekdays only; public holidays are not excluded.
Weekend days: 10
Resulting date: —
Day of the week: Friday → Sunday

Assumptions

Dates are local calendar dates; times and time zones are ignored.
Business days are Monday–Friday with no holiday exclusions.
Adding months keeps the day of month, clamped to the target month's length.

Common deadlines from May 1, 2026

After	Date	Falls on a
7 days	May 8, 2026	Friday
14 days	May 15, 2026	Friday
21 days	May 22, 2026	Friday
30 days	May 31, 2026	Sunday
45 days	June 15, 2026	Monday
60 days	June 30, 2026	Tuesday
90 days	July 30, 2026	Thursday
120 days	August 29, 2026	Saturday
180 days	October 28, 2026	Wednesday
365 days	May 1, 2027	Saturday

Calendar days counted from the start date, the day itself not counted. Deadlines written as 'within 90 days' are calendar days unless the contract or court rule says business days.

May in the next five years

Year	Days	Business days
May 2026	31 days	21 weekdays, 20 working
May 2027	31 days	21 weekdays, 20 working
May 2028	31 days	23 weekdays, 22 working
May 2029	31 days	23 weekdays, 22 working
May 2030	31 days	23 weekdays, 22 working

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