May 2026
31 daysStarts Friday, ends Sunday20 working days10 weekend daysISO weeks 18–22
| ISO week | Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|---|
| 18 | |||||||
| 19 | |||||||
| 20 | |||||||
| 21 | |||||||
| 22 | |||||||
| 23 |
Holidays in May
- Cinco de MayoTue, May 5 · Federal
- Mother's DaySun, May 10 · Federal
- Memorial DayMon, May 25 · Federal
Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 8 religious dates fall in May 2026 as well — see the calendar with every holiday.
Moon phases
- Full MoonFri, May 1, 1:23 PM
- Last QuarterSat, May 9, 5:10 PM
- New MoonSat, May 16, 4:00 PM
- First QuarterSat, May 23, 7:10 AM
- Full MoonSun, May 31, 4:45 AM
Times in US Eastern. Computed from Meeus, Astronomical Algorithms, ch. 49.
The moon through May
- 1
- 3
- 5
- 7
- 9
- 11
- 13
- 15
- 17
- 19
- 21
- 23
- 25
- 27
- 29
- 31
About May 2026
May 2026 has 31 days. It begins on a Friday and ends on a Sunday, which gives the month five Fridays, Saturdays and Sundays — and only four of every other weekday. Of its 21 weekdays, 1 is a federal holiday, leaving 20 working days.
Cinco de Mayo falls on Tuesday, May 5, 2026. Mother's Day falls on Sunday, May 10, 2026. Memorial Day falls on Monday, May 25, 2026.
The month runs from Friday, May 1, 2026 to Sunday, May 31, 2026, spanning ISO weeks 18 to 22.