[Cheburashka]

B.C.E. Before the common era.

A.C.E. After the common era.

How Common of them!

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I always read B.C.E. as Before Christian Era.

I've never heard of A.C.E. being used, but C.E., which I always read as Christian Era.

[Vaquero]

you are right on both counts .....it is C.E. and it is sometimes called Christian Era.

here is some more dope on it.

http://en.wikipedia.org/wiki/Common_Era