The Hebrews reckoned two evenings of each day, as appears from Ex. 16:12: 30:8; 12:6 (marg.); Lev. 23:5 (marg. R.V., between the two evenings). The first evening was that period when the sun was verging towards setting, and the second evening the moment of actual sunset.
BCE/CE usually refers to the Common Era (the years are the same as AD/BC). That is, BC is usually understood to mean Before the Common Era and CE to mean Common Era, though it is possible to reinterpret the abbreviations as Christian Era..
It is often roughly divided into the Archaic period (9th to 6th centuries BC), Classical period (5th and 4th centuries BC), and Hellenistic period (3rd century BC to 6th century AD). It is antedated in the second millennium BC by Mycenaean Greek. The language of the Hellenistic phase is known as Koine (common).