Astronomy Picture of the Day . The Moon In January . ... Explanation: Reckoning dates by Universal Time, the next full moon will be on Sunday, January 31. ... Perhaps only in recent times, the term "Blue Moon" has come to mean the second full moon in a month, joining a list of folklore names for the brightest lunar phase. ... In fact, the next (and last) Blue Moon in 1999 will occur in March, leaving February without a full moon at all. ... Publications with keywords: phase - blue moon - Moon . ...