It's pretty simple to prove or disapprove this theroy with an
application. As you know, there are applications that, when you
specify a year, it will show the calender for that year, even if
it's say, 1990 or 2025. Using this logic, we can have a program
that runs from a specified year to another specified year and
automatically count how many friday the 13th they are in that
particular year. It's not totally accurate, but at least you can
prove during say year 1000 to year 3000 there is/are how many
friday the 13th to each year specifically. It's not totally
accurate because it's only accurate as much as how you set the date
range.
