Hm? Oh. Well, Valentines is when we give chocolates or gifts to the people we care about. White Day is a month later when those people who received something give a gift in return. Christmas is...well, it's bigger in other countries really, rather than Japan. But it's a holiday for families to get together and have a feast and share presents! It's near the end of the year so a lot of people get some time off during it all and spent time with their families.