Christianity is based upon belief on Jesus Christ. Our calendars date from the time of his birth. Dates before his birth are marked either B.C. (Before Christ) or B.C.E. (Before Common Era). 100 B.C. and 100 B.C.E. are both the same date.
Jesus reinforced many Jewish beliefs. He taught that religion must be genuine. He healed people and showed forgiveness. Christian believe that he is the "son of God." Most Christians believe that he actually is God and that he died for our sins and rose again three days later.
The Bible is the book that all Christians recognize as Holy Scripture. It is divided into two parts - the Old Testament which tells of God's actions and promises before the time of Jesus, and the New Testament which tells how He sent Jesus as the savior of the world and how the early church grew. Originally most of the Old Testament was written in Hebrew and the New Testament was written in Greek.
These are websites which change their contents on a regular schedule and contain many of the same features you would find in a print magazine. They may contain stories, articles, games, illustrations, and other features.
The contents may change once a week, once a month, once a season, or on some other schedule, but should change at least once every three months.