Thanksgiving Day（感恩节）
Thanksgiving Day is usually a family day.People have big dinners and give thanks.In our daily life,many people help us a lot.Weneed to give thanks to them.
Christmas Day(圣诞节)
Santa Claus was invented in the United States in 1860’s.Christmas is a holiday for Christians all over the world.before Christmas ,people buy trees,presents and get ready for this celebration.Christmas songs,cards,lights are all added to make a better Christmas holiday.
The Mid-Autumn Festival(中秋节)
"When the moon is full,mankind is one."In China,the full moon signifies the family reunion.On this night,families will have parties,eat moon-cakes and enjoy the moonlight.
这是我自己总结的,全是精华,就是有点短（抱歉）,采不采纳随你的便啦!