Friday the 13th Calculator
A live countdown to the next Friday the 13th, plus every upcoming one over the next two years.
How this is calculated
This tool checks the 13th of every month going forward and flags the ones that land on a Friday, using the same UTC-safe date math as the rest of ZenCountdown. There's no lookup table involved — it's computed fresh from today's date every time the page loads, so it stays accurate indefinitely, and the list below always shows real upcoming dates rather than a fixed yearly list that would go stale.
Frequently asked questions
How often does Friday the 13th happen?
At least once a year and up to three times. Because of how the Gregorian calendar's leap-year cycle repeats, every calendar year has a minimum of one Friday the 13th and a maximum of three — it's never zero.
Is the 13th really more likely to fall on a Friday than other days?
Yes, very slightly. Over a full 400-year Gregorian calendar cycle, the 13th of the month falls on a Friday 688 times out of 4,800 months — a hair more often than any other weekday (Sunday and Wednesday tie for second at 687 each). It's a real quirk of the calendar's structure, not superstition, though the gap is far too small to ever notice in one lifetime.
Where does the Friday the 13th superstition come from?
It combines two older, separate superstitions — 13 as an unlucky number and Friday as an unlucky day — first linked together in print in the late 19th century. There's no single confirmed origin story, though both individual superstitions are much older than their combination.