To get a specific date, you may have to ask a more specific question? When did it begin for whom? What do you mean by Christianity?
If Christianity means to follow the teachings of Christ and, to emulate his life style, then it began for his disciples on the day when Jesus called them, and they dropped their fishing nets, and they walked away from their belongings and their families to follow him. It would be hard to find any earlier example than that.
If, on the other hand, you are asking about when was Christianity established as a recognized religion, then the answer is going to depend on what you mean by "established", what you mean by "recognized", what you mean by "religion." There probably are as many different answers as there are scholars who are qualified to tackle the question.
Christianity began with the life of Jesus Christ, which was about 2000 years ago. The formation of different denominations began within a few centuries of that time.
Catholicism is the biggest Christian denomination.
Catholicism is the biggest Christian denomination.
It began when there was a rift within the Orthodox Christian Church over where the Pope should be located.... Constantinople or Rome.
Christian Union - denomination - was created in 1864.
No, Adam is not in any way considered a prophet in any Christian denomination.
The Baptist Christian denomination, among many others, allows adults to be baptized.
she is anglican/christian
Catholic
Yes. 5o Cent has claimed to be Christian, but he has not mentioned what denomination he is part of.
Yes. We are a Protestant Christian denomination. Very much so.
No , He is a Christian of Anglican Denomination.
I believe she is Catholic.