Book review 2!!

Today I read a book, Seasons and Celebration. It was about Seasons and celabration around theworld!! Especially, I wanna explain about 1things, Valentine's day.
First, Valentine's day started over 2000 years ago, on 15 February, but after St. valentine died and changed from 15 to 14 February. In the early 19th century, people in England started to send card to the person they love!! It is same as Japan now. Only one is different, women give to men in Japan, but men give to women around the world. By the way, in South Korea has Black day that is meeting by many people don't have lovers. hahaha.....