‘Once in a Blue Moon’ – a rare Hallowe’en occurrence

Almost everyone has heard the expression, “once in a blue moon” referring to a rare happening and, on October 31st (Hallowe’en) 2020 a Blue Moon has taken place.

¬† ¬† ¬†Hallowe’en 2020 Blue Moon – for larger view, Click. on Images

According to science, a blue moon occurs when there are two full moons in one month and a blue moon is the second one.

A full moon appears on Hallowe’en approximately every 20 years … so here we are in 2020, another rare occurrence.