In 46 B.C.E., the world experienced the longest year in human history,a staggering 445 days that forever changed the way we track time. This remarkable period, orchestrated by Julius Caesar, was part ...

CNN 10’s Coy Wire explains how February 29th became the official date added to the calendar during a leap year and why not every century has a leap year.

This is often why there are budget impasses and the threat of short-term government shutdowns in the fall—budgets need approval by the start of the new fiscal year. Many non-profits also follow a ...

This calendar is lunisolar in nature, which means that it is based on the cycles of both the moon and the sun. The Lunar New Year begins each year with the first new moon of the lunar calendar.

A solar year — the time it takes Earth to orbit the sun — lasts around 365 days, while a lunar year, or 12 full cycles of the Moon, is roughly 354 days.

The marking of a New Year is an age-old tradition around the world—food, fireworks and reflection with friends and family are common threads, but ultimately this varies between different ...

For centuries, humans struggled to sync civil, religious, and agricultural calendars with the solar year. Adding a ‘leap year’ solved the problem—though just for the next 3,300 years.

It also lasts a year but doesn’t necessarily begin on Jan. 1. If a calendar year is used, YTD means from Jan. 1 of the current year to the date specified (usually today).