The blue supermoon sets over the White Mountain National Forest at sunrise, Thursday, Aug. 31, 2023, in Carroll County, New Hampshire. The next blue superman won’t occur until 2037.

Georgina Rannard BBC News A full Moon generally occurs once a month, meaning that an average year has 12. But the phases of the Moon actually take 29.5 days to complete, or 354 days for 12 cycles ...