Have you noticed anything different on the moon on the 13th? No? Here is some explanation about it. This event will only re-occur again on Aug. 13, 2049. I mean, the event being culminated into a 13th Friday. This is the only "unique" thing about it. Not the fact that it's a full moon. That's pretty normal.
There is some relation to the fact that these moons give special harvests yields. But it might all be related to the 13th Friday thing.
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