Most of us know what St Valentine's Day is, but let's remember it.

It's the day when people show their affection for another person or people by sending cards, flowers or chocolates with messages of love.

But do you know who St Valentine was?

There are a few stories about him, but the most popular belief about St Valentine is that he was a priest from Rome in the third century AD. Emperor Claudius II had banned marriage because he thought married men were bad soldiers. Valentine felt this was unfair, so he broke the rules and arranged marriages in secret. When Claudius found out, Valentine was thrown in jail and sentenced to death.

There, he fell in love with the jailer's daughter and when he was taken to be killed on 14 February he sent her a love letter signed "from your Valentine".

Is it celebrated in the same way all over the world?

The answer is NO. If you want to find out how it is celbrated in some countries, listen to the podcast that Lucía and Ana have recorded about the different ways and traditions related to this celebration.