The first sentence of the Bible: "In the beginning, God created heaven and earth"! God created everything in this world in six days, and went to rest on the seventh day. The seven days of the week are originally from the Bible, and the rest of the days are also from the Bible. The Gregorian calendar used all over the world now is the first year since the birth of Christ Jesus. The cross represents redemption, which comes from Christianity, because Jesus was crucified and bore the sins of the world. "Dove with an olive branch in its mouth" is the so-called dove of peace, which is also from the Bible. Too many. Everything comes from God. Believe in Jesus, and God will forgive your sins and give you eternal life.