Everyone knows today is a special day for all the romantics out there, but our reporter Sarah Clark has been looking back over the years and has found some of the weird and wonderful ways that romantics have shown their love.
But first she has been to North Yorkshire to meet one couple who had a 'steamy' start this morning.
The 'moustache card' at York Castle Museum is just one of many, says collections facilitator Faye Prior.
There is even a matching set warning of the perils of not having a Valentine, involving a lot of cats...
Collections facilitator at York Castle Museum, Faye Prior, says the moustache card is just one in a long tradition of strange Valentine's cards from the period.
She says it was part of the odd sense of humour of the time:
A museum believes it has unearthed the worst Valentine's Day card in history.
The 100-year-old Victorian example features real facial hair stuck on the design to resemble a moustache.
Its caption reads: "For The New Woman! With St. Valentine's Heartiest Greetings and Best Hopes that she will receive another (moustache) - With A Man Attached."
The card, which dates from around 1900, has gone on display at York Castle Museum as part of its celebration of the most romantic day of the year.