In parts of Europe lovers give each other St Valentine’s keys as romantic gestures and an invitation to unlock the giver’s heart.
In Finland, Valentine’s Day is called Ystävänpäivä, which means Friend’s Day and focuses on remembering friends.
However, in Mexico, February 14th is a day of national mourning.
In countries like Pakistan, Malaysia and Saudi Arabia celebrating the day can result in severe punishment and is seen by conservative Muslims as un-Islamic.
Japanese Valentine’s Day is about all about the men. Women give chocolates to them, and hope favour is returned later in the year.
In South Korea, February 14th is one of 12 ‘love’ days that fall on the 14th of each month. Women give men presents and they reciprocate on 'White Day' a month later. If the gift isn’t returned, singles celebrate White Day by eating jajangmyeon, a dish made from white noodles and black bean sauce.
In Brazil, Valentine's day isn’t celebrated in February because it usually falls on or around Brazil Carnival. Instead, Brazil celebrates ‘Dia dos Namorados’ on June 12.
Brazil’s celebration honours Saint Anthony - the patron saint of matchmaking and marriages.