User blog comment:Maria Trimble/Death in Supernatural Shows/@comment-67.142.182.21-20130619225531/@comment-67.142.182.25-20130621231422

Actually not on any full moon. There were about one or two full moons before the worm moon. Peter said timing was key because it all had to happen within that full moon. If timing wasn't key he could do it during any other full moon.