Hello there Woojung,
Thank you for submitting your homework. Like you I really love Christmas too specially here in Philippines Christmas is a very special holiday. During Christmas we exchange gifts with our love one's and we eat some special foods together with the whole family.
Please take notes of my corrections. Thank you..^_^
My favorite holiday is Christmas. -Correct
Because I like to get a presents, sometimes I like snowing, and I like to put up the Christmas tree.
Correct: I like to receive some presents, I like snowing and I like to put up the Christmas tree.
** Be careful with your sentence construction.
** Since your subject is written as "presents" you don't need to write the article "a" because it is only used for singular form of the word.
** You don't have to put (,) comma before writing your conjunction "and".
What I know about the Christmas is the day we celebrate Jesus' Birth. -Correct
I am sure that everyone would like Christmas. -Correct