On March 14th in Japan it is been held the “White Day”.
The White Day is boys or men that have to send back the favour (Chocolate) to the girls or women that have gave them Chocolate on St-Valentine’s Day.
You should know that in Japan, Valentine's Day is practice by girls or women who give a present of chocolate usually to a male to expression their love.
On White Day, the contrary happens: males who received a honmei-choco 本命チョコ "chocolate of love" or giri-choco 義理チョコ "courtesy chocolate") on Valentine's Day are expected to return the favor by giving gifts, usually more expensive.
Traditionally, popular White Day gifts are cookies, jewellery and white chocolate, white lingerie. The generally recited rule about the return gift should be two to three times the cost of the Valentine's gift. The term is called sanbai gaeshi 三倍返しmeans literally "thrice the return".
Happy White day !!!