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May 2027

31 daysStarts Saturday, ends Monday20 working days10 weekend daysISO weeks 17–22

Calendar grid for 5/2027, weeks starting Sun
ISO week
17
18
19
20
21
22

Holidays in May

  • Cinco de MayoWed, May 5 · Federal
  • Mother's DaySun, May 9 · Federal
  • Memorial DayMon, May 31 · Federal

Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 7 religious dates fall in May 2027 as well — see the calendar with every holiday.

Moon phases

  • New MoonThu, May 6, 6:58 AM
  • First QuarterThu, May 13, 12:43 AM
  • Full MoonThu, May 20, 6:58 AM
  • Last QuarterFri, May 28, 9:57 AM

Times in US Eastern. Computed from Meeus, Astronomical Algorithms, ch. 49.

The moon through May

  1. 1
  2. 3
  3. 5
  4. 7
  5. 9
  6. 11
  7. 13
  8. 15
  9. 17
  10. 19
  11. 21
  12. 23
  13. 25
  14. 27
  15. 29
  16. 31
The moon every other evening, drawn at its true illumination. The terminator is a semi-ellipse, not a straight edge — it only looks straight at the quarters.

About May 2027

May 2027 has 31 days. It begins on a Saturday and ends on a Monday, which gives the month five Saturdays, Sundays and Mondays — 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 Wednesday, May 5, 2027. Mother's Day falls on Sunday, May 9, 2027. Memorial Day falls on Monday, May 31, 2027.

The month runs from Saturday, May 1, 2027 to Monday, May 31, 2027, spanning ISO weeks 17 to 22.

Calendar with holidaysPrintable versionDownload PDFFull year 2027