May 2031 Calendar
May 2031 has 31 days, 22 of them working days once Saturdays and Sundays are removed. Week numbers follow ISO 8601, which gives a week to the year that owns its Thursday — that is why 1 January can fall in week 53 of the year before. Marked days: Mother's Day, Memorial Day. The ones that move are placed by a rule, printed beside each date.
Holiday rules and week numbering checked · How we check
31 days, 22 of them working days. The number down the left is the ISO week; public holidays are not deducted, because which ones apply depends on where you are.
| wk | Mo | Tu | We | Th | Fr | Sa | Su |
|---|---|---|---|---|---|---|---|
| 18 | 28 | 29 | 30 | 1 | 2 | 3 | 4 |
| 19 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 20 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 21 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 22 | 26 | 27 | 28 | 29 | 30 | 31 | 1 |
How many of each day
Every month holds four of every weekday and then two or three days over. Which weekdays get the extra one is the only thing separating this month from any other of the same length — and it is what decides a five-payday month for anyone paid weekly.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 4 | 4 | 4 | 5 | 5 | 5 | 4 |
- Thursday, Friday, Saturday come round five times; every other day four.
- It opens on a Thursday and closes on a Saturday, covering ISO weeks 18 to 22 in quarter 2.
- Day 121 to day 151 of 2031, leaving 214 days in the year after it.
- The identical grid returns in 2014, 2025, 2036 and 2042 — same starting weekday, same length, so a wall calendar from one of those years hangs again unchanged.
Marked days in May 2031
Underlined in the grid above. Each one links to the count of days until it and the rule that places it, because half of these are not on a fixed date at all.
Mother's Day Sun, May 11, 2031
Memorial Day Mon, May 26, 2031
Which day does the week start on?
Laid out Monday first, as ISO weeks are.
What do the week numbers mean?
The number down the left of each row is the ISO 8601 week, which runs Monday to Sunday and belongs to the year that owns its Thursday. May 2031 covers weeks 18 to 22. Every week of 2031, numbered.
Other months of 2031
Other years
Questions people actually ask
- How many days does May 2031 have?
- 31, of which 22 are working days once Saturdays and Sundays are removed and 9 are weekend days. Public holidays are not deducted from that figure, because which ones apply depends on where you are — Mother's Day, Memorial Day fall in this month.
- How many Thursdays, Fridays, Saturdays are in May 2031?
- Five of each — Thursday, Friday, Saturday come round a fifth time where every other weekday comes four. That is what separates this month from any other of the same length, and for anyone paid weekly it is the difference between four cheques and five.
- What week number is May 2031?
- It spans ISO weeks 18 to 22. An ISO week runs Monday to Sunday and belongs to the year that owns its Thursday, which is why the first days of January can carry week 53 of the year before. The US business convention of numbering from 1 January gives different answers, and payroll systems disagree about which one they mean.
- What day of the week does May 2031 start on?
- A Thursday, and it ends on a Saturday. It runs from day 121 to day 151 of the year, leaving 214 days after it.