also: バレンタイン・デー · ヴァレンタインデー · ヴァレンタイン・デー
Valentine's Day
Refers to February 14th, when people give chocolates or gifts, especially in the Japanese custom of women giving chocolates to men.
I gave chocolates on Valentine's Day.
I gave chocolate to the person I like on Valentine's Day.
I plan to spend this year's Valentine's Day with my boyfriend.