Common Era – Wikipedia

Common Era or Current Era (CE) is one of the notation systems for the world’s most widely used calendar era. BCE (Before the Common Era or Before the Current Era) is the era before CE.BCE and CE are alternatives to the Dionysian BC and AD system respectively. The Dionysian era distinguishes eras using AD (anno Domini, “[the] year of [the] Lord”) and BC (“before Christ”).

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