@DeWayfarer i like 13 because it's one of nature's numbers in the Fibonacci sequence. It's the first number that divides the next number (21) into the 1 : 1.61 range, which is a natural ratio that so many things grow or reproduce at. Its called Phi (Φ) or referred to as the golden ratio and most famously recognized within the nautilus shell
@DeWayfarer yes, a lot of the Fibonacci numbers aren't prime numbers. If you consider 13 is the 7th number, one might consider it to be a double prime number. 😉
Pretty sure there will be a 3rd one this year aswell, but I haven't checked.
I only suspect so bc moms bday is feb 13th, and when that falls on a friday I seem to remember there will be 3 of those that year (unless it's a leap year)
Will check right now to see wether or not I'm right. Will edit comment when I know.
Edit: I was right. November will have friday 13th aswell
In non-leap years,the days/dates for February and March are always identical,up to March 28 at least - so we score two Friday 13ths this year.In all such years,November always starts on the same day of the week as do Feb.and March,so this year - for good or ill! - we'll have a total of three Friday 13ths!
Underlying what you said, whenever a non-leap-year of 365 days starts on a Thursday, the months of February, March and November will start on a Sunday. And any month starting on a Sunday always has a Friday the 13th.
So triple F13 years aren't that rare. A grand total of eleven February-March-November Friday the 13th years takes place in the 21st century (2001-2100).
Also, if a leap year starts on a Sunday (like 22012) it'll have triple F13, and that cycle repeats every 28 years.
