Skip to content
DateAlmanac

May 2031

  • 31 days
  • Starts Thursday
  • Ends Saturday
  • 21 working days
  • 9 weekend days
  • ISO weeks 18–22
Calendar grid for 5/2031, weeks starting Sun
ISO week number, Monday to Sunday
18
19
20
21
22

Holiday or observanceWeekend

Holidays in May

  • Cinco de MayoMay 5
  • Mother's DayMay 11
  • Memorial DayMay 26

Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 5 religious dates fall in May 2031 as well — see the calendar with every holiday.

Moon phases

  • Full moon

    Tue, May 6

    11:39 PM ET

  • Last quarter

    Tue, May 13

    3:06 PM ET

  • New moon

    Wed, May 21

    3:17 AM ET

  • First quarter

    Thu, May 29

    7:19 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 2031

May 2031 has 31 days. It begins on a Thursday and ends on a Saturday, which gives the month five Thursdays, Fridays and Saturdays — and only four of every other weekday. Of its 22 weekdays, 1 is a federal holiday, leaving 21 working days.

2031 at a glance

Calendar with holidaysPrintable versionDownload PDFFull year 2031