What is the Difference between BC & AD & BCE & CE? How to Understand IN TELUGU || ALCHEMIST

HOW GREGORIAN CALENDER SYSTEM WAS INVENTED IN TELUGU ALCHEMIST #gregoriancalendar #gregorian #shaka #time #documentary #HISTORY #WORLDHISTORY #ANCIENTHISTORY #MODERNHISTORY #WORLDAFFAIRS #CURRENTAFFAIRS #INTERNATIONALNEWS #GEOPOLITICS #telugualchemist