What is a Black Moon and How is it different from a Blue Moon?

While most people would have heard about the blue moon, more commonly in the phrase, “once in a blue moon”, we are here to discuss what a black moon is. A black moon is a second new moon within a single calendar month, while a blue moon is a second full moon within a single calendar month.

Black Moon:

Astrologically speaking, both a black moon and a blue moon refer to lunar doubleheaders and are both extremely rare. Both phenomena occur once every 32 months and sometimes only in particular time zones.

This “bonus moon” means we have 13 new moons in a calendar year, rather than the typical 12 new moons. And since new moons create the most expansive (highest to lowest tides), having an extra new moon might bring an epic burst of growth in a single month.

Normally, there is only one new moon and one full moon per month, i.e., in other words, a total of 12 full moons per solar calendar year. In black moon years, there are 13 new moons on the calendar, a “bonus moon” if you will.

This can only happen in a month that has 30, or usually 31, days. We will never have a black moon in February because there are only 28 or 29 days in that month. A lunar month (a complete cycle of the eight moon phases) is 29.5 days long. So that means a new moon can get skipped in February on rare occasions.