Valentine's Day is named after Saint Valentine, a Christian martyr who lived in the 3rd century AD.
The first Valentine's Day card was sent in the 15th century.
The red rose is a traditional symbol of love and is often given on Valentine's Day.
Valentine's Day is one of the biggest days of the year for the greeting card industry.
In some countries, Valentine's Day is also known as "Friendship Day"
1. In Japan, it is customary for women to give chocolate to men on Valentine's Day, and for men to return the favor on a different day.
Valentine's Day is a popular day for marriage proposals.
The heart shape, often associated with love and Valentine's Day, was first used in the 15th century
In Finland and Estonia, Valentine's Day is called "Friend's Day" and is a celebration of friendship rather than romantic love.