On Monday, observers of the skies will once again have the opportunity to experience a rare "black moon." There was already a black moon on December ... new moon in a calendar month.

This phenomenon, defined as the second new moon in a single calendar month ... sunrise limits visibility. The black moon reaches its peak on December 30, 2024, at 5:27 p.m. ET (22:27 GMT).

The company says that as of 2024, it began listing only public holidays and national observances, not cultural and historical ...

Google said that maintaining hundreds of moments manually and consistently globally wasn't "scalable or sustainable".The ...