BC/AD VS. BCE/CE

Someone asked me what is the difference between BC/AD and BCE/CE. Well BC is short for Before Christ. AD is short for Anno Domini which is Latin for Year of Our Lord. BCE is short Before the Common Era. CE is short for Common Era. AD and CE are used to show dates that happened after year 1 or the birth of Jesus. CE and BCE are used to show dates that happened before year 1. Here are a few examples: 453 BC, 33BCE, 1453 AD and 1988 CE. Other then the religious side of the two systems they are the same. So... it is just which system you want to use. I found a few pictures of the people who promoted these two systems. The first picture is a photo of a statue of Charlemagne. He made the people of his kingdom use BC/AD. The second picture is of Johannes Kelper. He tried to get the BCE/CE system installed in Europe and the BC/AD system removed or replaced.