Daily Archives: September 12, 2019

Everything AD does but backwards, in high heels

Long ago, in the dim misty recesses of history, there was a famous dance couple: Fred Astaire and Ginger Rogers. Their dance routines were stylish and glamorous—and captured in movie musicals so you can still watch them. Fred and Ginger made dancing look easy by putting in a lot of rehearsal time.

Ginger once joked that not only did she do everything Fred did, but she did it backwards, in high heels.

If you thought it was hard to figure out how the centuries are referred to in Anno Domini, how do we ever count back the centuries Before Christ? We live in the 2000s and call it the 21st Century. The 21st Century ad starts with 2001 and ends with 2100. How does that work in bc, where you count backwards?

Let’s pick a century. How about the 4th century? The 4th century Anno Domini started the first day of ad 301 and ended the last day of ad 400. It’s just the opposite in bc. The 4th century Before Christ started the first day of 400 bc and ended the last day of 301 bc.

Are you getting a headache yet?

Back to the beginning of The Western Civ User’s Guide to Time & Space.