Question

what is meaning of 623 B. C​

Answer 1

B.C. and A.D. Explained. B.C. stands for "before Christ," meaning before Jesus was born. So 400 B.C. means 400 years before Jesus was born. A.D. comes from the Latin "anno Domini," which means "in the year of the Lord."

Answer 2

it means this date was given before christ (b.c)