There were myths associated with this pagan festival of the Romans, which persisted with their Christian heirs. Among the most famous of these myths was the Roman belief that Romulus, the founder of Rome, was suckled one day by a she-wolf, which gave him strength and wisdom.
The Romans used to celebrate this event in mid-February each year with a big festival.
One of the rituals of this festival was the sacrifice of a dog and a goat. Two strong and muscular youths would daub the blood of the dog and goat onto their bodies, and then they would wash the blood away with milk. After that there would be a great parade, with these two youths at its head, which would go about the streets. The two youths would have pieces of leather with which they would hit everyone who crossed their path. The Roman women would welcome these blows, because they believed that they could prevent or cure infertility.
The connection between Saint Valentine and this festival:
Saint Valentine is a name which is given to two of the ancient "martyrs" of the Christian Church. It was said that there were two of them, or that there was only one, who died in Rome as the result of the persecution of the Gothic leader Claudius, c. 296 CE. In 350 CE, a church was built in Rome on the site of the place where he died, to perpetuate his memory.
When the Romans embraced Christianity, they continued to celebrate the Feast of Love mentioned above, but they changed it from the pagan concept of "spiritual love" to another concept known as the "martyrs of love", represented by Saint Valentine who had advocated love and peace, for which cause he was martyred, according to their claims. It was also called the Feast of Lovers, and Saint Valentine was considered to be the patron saint of lovers.
One of their false beliefs connected with this festival was that the names of girls who had reached marriageable age would be written on small rolls of paper and placed in a dish on a table. Then the young men who wanted to get married would be called, and each of them would pick a piece of paper. He would put himself at the service of the girl whose name he had drawn for one year, so that they could find out about one another. Then they would get married, or they would repeat the same process again on the day of the festival in the following year.
The Christian clergy reacted against this tradition, which they considered to have a corrupting influence on the morals of young men and women. It was abolished in Italy, where it had been well-known, then it was revived in the eighteenth and nineteenth centuries, when in some western countries there appeared shops which sold small books called “Valentine’s books”, which contained love poems, from which the one who wanted to send a greeting to his sweetheart could choose. They also contained suggestions for writing love letters.
We should avoid anything associated with pagan immoral practices – We do not need to honour or celebrate the death of a Christian "saint" – Islam does not encourage flirting or suggestions of romantic relationships before marriage – Love between families, friends and married people does not need to be celebrated on a day with such un-Islamic origins.
Abu Saeed al-Khudri (R.A) that Nabi (Sallallahu Alayhi Wa Sallam) said: “You will certainly follow the ways of those who came before you, span by span, cubit by cubit, until even if they were to enter a lizard’s hole, you would follow them.” We said, “O Messenger of Allah, (do you mean) the Jews and Christians?” He said, “Who else?!” (Bukhari)
Nabi (Sallallahu Alayhi Wa Sallam) said: “Whoever imitates a people is one of them.” (Abu dawood)
Al-Hafiz al-Dhahabi (RA) said: “If the Christians have a festival and the Jews have a festival, which belongs only to them, then the Muslim should not join them in that, just as he does not join them in their religion or their direction of prayer.”
2- It promotes love and infatuation.
3- It calls for hearts to be preoccupied with foolish matters that are contrary to the way of Nabi (Sallallahu Alayhi Wa Sallam).