Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
On April Fool's Day in 1977, the UK newspaper The Guardian ran a 7 page feature on the discovery of the fictitious island nation of "San Seriffe."
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).