By using the Christian Calendar.
Christianity
The Old Testament is the basis of Christianity.
The Holy Bible including both the Old and New Testaments is the book for Christianity.
No!
Christianity shares the Old Testament with Judaism, and the New Testament is specific to Christianity.
Jesus was resurrected (raised from the dead and in Heaven) when Christianity began. Christianity began with Jewish apostles who believed that Jesus was the Messiah.
Word Christianity was mentioned in the Old Testament the exact number of times that it was mentioned in the New Testament - zero.
The Old Testament & the Torah are the same Books. Abraham is the Father of both Judaism & Christianity.
1) How old is christainity? Christianity is 2009 + 33 Years old. 2) Founder of christainity? Jesus Christ is the founder of Christianity. People who follow / worship Jesus Christ are known as Christians.
Christianity comes from Judaism. The Jewish Holy Book is the Torah, which is the Old Testament in the Christian's Bible.
The scriptures of Christianity are contained in the Bible: 39 books of the Old Testament and 27 books of the New Testament.
Christianity is the foundation of all human existance; ultimately building our society's moral building blocks before any old regime