Calendars have always been essential in our world — and right now is no different. The Calendar is essential to almost everything we do in life. Every appointment and every meeting has a timeframe ...

For something that’s meant to lend order to our lives, the modern Western calendar has a messy history. The mess, in part, comes about because of the difficulty of coordinating the orbits of celestial ...

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 says ...

pt. 1. Calendar in theory -- ch. 1. Calendar -- ch. 2. Astronomical background -- ch. 3. Time and the clock -- ch. 4. Writing and libraries -- ch. 5. Numbers and ...

With December just a couple of weeks away, the holiday season is truly upon us. While tradition dictates that you should start an Advent Calendar on Dec. 1 and continue with it every day until Dec. 25 ...

For productivity and organization, nothing can replace a comprehensive calendar. In addition to their many specialized features, calendars come in a wide variety of shapes and sizes. The challenge is ...

Discover how the ancient Maya recorded dates using one of the most advanced calendar systems in the ancient world. This highlight from ATG dives into their unique way of marking time and what it tells ...