Friday-the-13th Finder
Find every Friday the 13th between two years — there's always at least one, and never more than three, per calendar year.
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About this tool
A "Friday the 13th" is simply the 13th day of any month that happens to fall on a Friday. Because of how weekdays shift through the Gregorian calendar's repeating patterns, every calendar year has at least one Friday the 13th, and can have up to three. This tool checks every month in the range you enter, lists the ones that land on a Friday and shows the next one coming up. Curiously, over the Gregorian calendar’s 400-year cycle the 13th falls on a Friday slightly more often than on any other day of the week.