Lunar New Year began Saturday February 10. But have you ever stopped to wonder why it's celebrated at this time or where the current Chinese calendar comes from? Space historian Osnat Katz Moon ...

On the Gregorian calendar, the civil calendar used in most countries, including the United States, the Lunar New Year changes every year, as do the dates of holidays like Rosh Hashana, Diwali and ...

Fresh research about ripples in the fabric of spacetime suggests a nearly 2,000-year-old cosmic calculator followed the lunar calendar instead of the solar one. The hand-powered "Antikythera ...