what is AD and BC? ( HINDI)

what is AD and BC? ( HINDI)
what year are we living in? That seems like an easy question, doesn’t it? But like most things, the answer isn’t as straightforward as you may think. Many people would tell you this is the year A.D. 2020. Others might call it the year 2020 C.E. Some would say it’s the year 4718, 1441, or even 5780! It all depends on which of the world’s many calendars you’re reading.
Today, most countries use the Gregorian calendar as their civil calendar. That means it’s used for official purposes, like government and business. Established by Pope Gregory XIII in 1577, the Gregorian calendar marks years using the abbreviations B.C. and A.D.
What exactly do B.C. and A.D. stand for? B.C. stands for “Before Christ,” as in Jesus Christ. It indicates the number of years before the birth of Jesus (although Jesus himself was born in 4 B.C.). A.D. stands for the Latin phrase Anno Domini. That translates to “In the year of our Lord.” It’s used to mark years after the birth of Jesus.