Check for more details in the FEARS and PHOBIAS chapter of NUMBERS- The Key to the Universe!
When is FRIDAY 13th?


If so then you have a fear of Friday 13th! Happily help is at hand. Use this calculator to find when the Friday 13ths are in any years you're worried about.

Enter beginning year:

Enter ending year:

You can also pick a particular month:

This essential little gadget was invented by
Donnie Brewer and we found it at
The JavaScript Source

The Murderous Maths Home Page