December 2024 will see a rare "black moon," a term for the second new moon in a calendar month. The second new moon of December will occur at 5:27 p.m. ET (2227 GMT) on Dec. 30, according to the U ...

Something rare is happening in the skies in the next few days — a black moon. This rare celestial event is due to an unusual calendar alignment: two new moons in one month. The first occurred on ...