Summary of Understanding calendar notation | Cosmology & Astronomy | Khan Academy

00:00:00 - 00:05:00

This video explains the different notation schemes for writing dates, with BCE (Before the Common Era) and CE (Common Era) being the most common. BC (Before Christ) is a less common option, and some Christians find it ironic because it removes references to the birth of Christ. Ultimately, the convention is to use BCE and CE, which both refer to Christ in every year. There is no year 0, and the further back in time you go, the larger the number.

• 00:00:00 This video explains different ways to write dates, including BC, CE, and AD. CE stands for Common Era, which is the same as AD. BC and AD both refer to the same year, but AD refers to after death, while BC refers to before Christ. Columbus' first voyage wasn't actually in 1492 AD, but 1492 CE.
• 00:05:00 The video discusses the different naming schemes for calendar notation, with BCE (Before the Common Era) and CE (Common Era) being the most common. BC (Before Christ) is a less common option, and some Christians find it ironic because it removes references to the birth of Christ. Ultimately, the convention is to use BCE and CE, which both refer to Christ in every year. There is no year 0, and the further back in time you go, the larger the number.