These graphics explain why Easter Sunday changes each year based on ancient interpretations of the solar and lunar cycles.

The next full moon is at 12:56 pm EST on Monday, May 12 and is known as the Flower Moon. Here is a look at all the full moons ...

Carvings on a 12,000-year-old monument in Turkey appear to mark solar days and years, making it possibly the oldest solar ...

Orlando schools are almost out for summer, but the calendar is already set for the new school year. Below are the current ...

Easter falls on the later side of its ever-changing schedule in 2025. Here's everything you need to know about the holiday, ...

CLEVELAND — An impassioned debate is underway within the Cleveland Metropolitan School District over a proposal to consolidate its five different school calendars into one traditional calendar ...