User blog comment:Paul.rea/Teen Wolf Timeline/@comment-5982789-20130602152432/@comment-78.23.224.172-20140810040158

Actualy, it is possible and happens every few years; it's the so called blue moon. Depending on the definition it's either the third of four full moons in a single season or the second full moon in a month. Following the later definition, the last one was in 2012 and the next one will be in july 2015. Apparently in 2028 there will be one during new year's eve that coincides with a total lunar eclipse, last time this happened was in 2009.