May 2027 Calendar
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May 2027 at a glance
| Wk | Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|---|
| 17 | 1 | ||||||
| 18 | 2 | 3 | 4 | 5 Cinco de Mayo | 6 | 7 | 8 |
| 19 | 9 Mother's Day | 10 | 11 | 12 | 13 | 14 | 15 |
| 20 | 16 Eid al-Adha | 17 | 18 | 19 | 20 | 21 | 22 |
| 21 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 22 | 30 | 31 Memorial Day |
About May 2027
May 2027 has 31 days. It starts on a Saturday and ends on a Monday, with 21 weekdays (Monday to Friday) and 20 federal working days once the holiday is taken out. The month covers ISO weeks 17 to 22 and days 121 to 151 of the year (quarter 2).
Federal holiday this month: Memorial Day on Monday, May 31, 2027 (the last Monday in May).
Long weekend: Sat, May 29 to Mon, May 31 (Memorial Day).
The full moon falls on Thu, May 20 (Flower Moon, 6:59 a.m. EDT).
Holidays and observances in May 2027
| Date | Holiday | Type |
|---|---|---|
| Wed, May 5 | Cinco de Mayo | Observance |
| Sun, May 9 | Mother's Day | Observance |
| Sun, May 16 | Eid al-AdhaCalculated date. Observance may differ by one day depending on moon sighting and local authority. Begins at sundown the evening before. | Religious |
| Mon, May 31 | Memorial DayFederal offices, banks and most post offices closed. | Federal holiday |
Moon phases in May 2027
- New Moon: Thu, May 6 at 6:59 a.m. EDT
- First Quarter: Thu, May 13 at 12:44 a.m. EDT
- Full Moon: Thu, May 20 at 6:59 a.m. EDT
- Last Quarter: Fri, May 28 at 9:58 a.m. EDT
Questions and answers
What day does May 2027 start on?
May 2027 starts on Saturday, May 1, 2027 and ends on Monday, May 31, 2027.
How many working days are in May 2027?
There are 21 weekdays in May 2027. Taking out the federal holiday leaves 20 working days for federal offices. Private employers set their own holidays.
What holidays are in May 2027?
Federal: Memorial Day (Mon, May 31). Other dates: Cinco de Mayo (Wed, May 5), Mother's Day (Sun, May 9), Eid al-Adha (Sun, May 16).
What week numbers are in May 2027?
May 2027 covers ISO weeks 17 to 22. ISO weeks start on Monday, and week 1 is the week with the year's first Thursday.
Holidays: U.S. Office of Personnel Management, Federal Holidays (5 U.S.C. 6103), last checked October 17, 2026. Moon phases calculated with Astronomy Engine, US Eastern Time. Unofficial calendar for planning; check with your employer or agency.