The full Harvest Moon looms over Watertown on Friday night, as seen from Public Square. The moment the moon turned completely full occurred after midnight, at 12:33 a.m., technically Saturday the 14th.
This week’s full moon — on Friday the 13th — was the first of its kind since way back in 2006.
But September’s curiously-timed full moon — called a “Harvest Moon” because it’s the nearest one to the autumnal equinox Sept. 23 — will be even more unusual: This one also will be a so-called “Split Time Zone Full Moon,” which as the Farmer’s Almanac explains is quite rare as well:
“Interestingly, the last time this happened — June 13, 2014 — it was the reverse of what will happen this month,” according to the article. “It was a Friday the 13th full Moon solely for the Eastern Time Zone, with the Moon turning full just after midnight; for the rest of the country, the full Moon was the day before, on Thursday, the 12th. Nationwide we haven’t had a Friday the 13th full Moon since October 13th, 2000, and it won’t happen again until August 13th, 2049!”