Christmas is the commemorationn of the birth of Jesus Christ. It is cellebrated on December 25. It is a Christian cellebration, but nowadays it is a mix of Christian and secular tradition.
In many countries people have customs that include gift giving, Christmas decorations, music, carols, cards, lights, trees..., not forgetting the figure of Santa Claus (also known as Father Christmas or Saint Nicholas) who brings presents to children.
Have you written a letter for Santa? I wish he would bring what you asked him. But don't forget to ask for gifts for kids that do not have.
Here you are a super simple Christmas Carol to sing at school with your youngest students.