David Dickinson at Universe Today:
What we’re seeing here is merely the intersection of three cycles of events… and nothing more. These sorts of things can be fun to calculate and can provide a teachable moment, even when that well meaning but often misinformed relative/coworker/stranger on Twitter sends it your way . Hey, some people golf or collect steel pennies, this is our shtick.
A “Friday the 13th Honey Moon” is basically the subset of: 1. Fridays that fall on the 13th day of the month (OK, that’s two input perimeters, we know) that also 2. Fall in the month of June, and 3. Occur on a Full Moon. Friday the 13th occurs from one to three times a calendar year, so you can already see that one will occasionally happen to land on a Full Moon date fairly frequently… but how ‘bout in June?