Ultra-rare blue moon will illuminate Halloween sky
If youโre out trick-or-treating and hear a howling wolf... it might be due to the rare blue moon illuminating the sky. Thatโs right... and it apparently only happens once in a blue moon! *see what I did there*Two full moons will light up the sky in October, which only happens about every three years, Prevention reports. This yearโs Harvest Moon will peak on Thursday, Oct. 1. Then, the Blue Halloween Hunterโs Moon will appear on Oct. 31st!