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..
The Old Kingdom is the name commonly given to the period in the 3rd millennium BC when Egypt attained its first continuous peak of civilization in complexity and achievement â the first of three so-called Kingdom periods, which mark the high points of civilization in the lower Nile Valley (the others being Middle Kingdom and the New Kingdom).