Thanks to Edward C.
This is a scam – misinformation. Check August 2003, 2008, July 2016, Dec 2017 and May 2020. Lots of them.
Simply: Any 31-day month that begins on a Friday will have five Fridays, Saturdays, and Sundays.
Check the comments for an explanation.
Graham.
This is the only time you’ll see this phenomenon in your life.
Calendar August 2014
| Sun | Mon | Tues | Wed | Thur | Fri | Sat |
| 1 | 2 | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31 |
August, this year, will have 5 Fridays, 5 Saturdays and 5 Sundays. This happens only once every 823 years. The Chinese call it ‘Silver pockets full’.
It happens whenever the first of August is Friday, which averages once every SEVEN years, not once in 823. It is not exactly once in seven because leap years mess up the pattern. It previously happened in August in 2003 and 2008, and the next instance will be in 2025.