Skip to content
DateAlmanac

May 2027

  • 31 days
  • Starts Saturday
  • Ends Monday
  • 20 working days
  • 10 weekend days
  • ISO weeks 17–22
Calendar grid for 5/2027, weeks starting Sun
ISO week number, Monday to Sunday
17
18
19
20
21
22

Holiday or observanceWeekend

Holidays in May

  • Cinco de MayoMay 5
  • Mother's DayMay 9
  • Memorial DayMay 31

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 moon

    Thu, May 6

    6:58 AM ET

  • First quarter

    Thu, May 13

    12:43 AM ET

  • Full moon

    Thu, May 20

    6:58 AM ET

  • Last quarter

    Fri, May 28

    9:57 AM ET

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.

2027 at a glance

Calendar with holidaysPrintable versionDownload PDFFull year 2027