‪There is a rare Friday the 13th Full Moon in the sky tonight. The last time we saw a Friday the 13th Full Moon was back in January 2006. The last time we saw a Friday the 13th Harvest Full Moon was all the way back in 1867. The next time we'll see a Friday the 13th Full Moon will be in August of 2049 and September of 2171 for a Harvest Full Moon.‬