Anno Domini

Have you ever seen 'AD' next to a year, like 2023 AD? It's like a secret code! 'Anno Domini' is a special Latin phrase that means 'in the year of our Lord'. It's a way people have counted years for a very long time, starting from a special event. Think of it like a giant timeline for the whole world!

A super smart monk named Dionysius Exiguus came up with this idea a long, long time ago, around the year 525. He wanted a way to organize all the years. It took a while, but by the year 800, lots of people started using his system to count years. It helped everyone agree on when things happened!

When we use 'AD', we count years going forward from that special starting point. But what about before that? We use 'BC', which means 'Before Christ'. So, the year 1 BC is right before the year 1 AD. There's no year zero in between them, just like there's no zero on a ruler between the 1-inch and 2-inch marks!

Some people like to use different words to count the years so everyone feels included. They call the years 'CE' (Common Era) instead of AD, and 'BCE' (Before Common Era) instead of BC. It uses the same numbers but sounds a bit more neutral. It's like having two different ways to say the same thing!