We’ve all heard the saying “once in a blue moon”
Three separate celestial events — a supermoon, a blue moon and a full lunar eclipse — will occur simultaneously on January 31.
The full moon on January 31 is called a blue moon because it is the second full moon in a calendar month. This only happens every two to three years on average, giving rise to the saying “once in a blue moon”.
We will be meeting at the listed co ordinates at 730pm-830pm on 31 January 2018.