Researchers at Lab 42 asked 500 LinkedIn users that question and many more, and came up with a variety of answers in this infographic. Among the fun facts they uncovered: We found it interesting the way top level executives use the service in vastly different ways from entry-level workers.
BCE stands for  Before the common era . BC means  Before Christ,  or  Before the Messiah.  Both measure the number of years before the approximate birthday of Yeshua/Jesus. Designation of a year in BC and BCE also have identical values. Many people assume that Yeshua/Jesus was born at the end of 1 BCE.
The meaning of AD is Anno Domini or Year of our Lord referring to the year of Christâs birth. The meaning of BC is Before Christ. CE is a recent term. It refers to Common Era and is used in place of A.D. the dates are the same i.e., 2009 AD is 2009 CE. BCE means Before Common Era. For example 400 BC is 400 BCE.