A.D to C.E

Recently I came across a year notation like "6th century B.C.E" and I was lost. What is B.C.E? Turns out when I was not looking, the calendar convention B.C and A.D., which we were taught in the schools was changed to B.C.E and C.E.

The use of C.E.—signifying "Common Era" apparently has become popular in recent decades. As Christians and others have become increasing aware that Christianity is not the only Western tradition, it has made sense to many to switch the designation of dates from A.D. (Anno Domini meaning in the year of the Lord) to C.E., and thus also from B.C. ("Before Christ") to B.C.E. ("Before the Common Era").

Well. Perhaps we should close the history books on Y2K and start afresh on a new scientific era (S.E). Let's get ready for 10 S.E folks!
:-)