How often are there two Friday the 13th's in a row?

Answer 1

Oh, dude, that's like a rare cosmic event! So, there can be two Friday the 13th's in a row if a month starts on a Sunday. This happens like once every 11 years or so. So, mark your calendar and get ready for double the bad luck!

Answer 2

Once every 6 or 11 years, in a regular cycle through the year 2100, when the cycle will change. Only one pairing, a non-leap year where February 13 is on a Friday, will have the 13th of the next month (March 13) also on a Friday.

The recent years where this occurs demonstrates the cycle:

1953

1959 (6 years)

1970 (11 years)

1981 (11 years)

1987 (6 years)

1998 (11 years)

2009 (11 years)

2015 (6 years)

2026 (11 years)

2037 (11 years)

2043 (6 years)

Answer 3

Well, honey, two Friday the 13th's in a row can happen once a year if the year starts on a Thursday. So, technically, it's possible, but it's about as rare as finding a unicorn at a yard sale. So, don't hold your breath waiting for that double dose of bad luck.

Answer 4

Odds of any given month having an occurrence = 1/7

Odds of it occurring in a non leap year February = 3/48 = 1/16

1/16 * 1/7 = 1/112 = once every nine years and four months in