In many Muslim-dominated countries, there is a ban on Muslims against celebration of Valentine’s Day to the extent of being charged in the Shariah Court for defying the ban and punished.
In Indonesia, there was protest against the celebration by Muslims and they carried signs reading "Valentine, Infidel Culture" at rallies. Muslim clerics warned people against Valentine’s Day calling it a 'sex holiday' blaming that it did not reflect love in accordance with Islamic teachings.
A website 'islamweb' says, "In Islam, the festivals are clearly defined and well established, and no additions or subtractions may be accepted. They are an essential part of our worship and there is no room for personal opinion.
Calling Valentine’s Day observance by Muslims as Haaram , the website adds, "Imitating non-Muslims in general - whether they are idol-worshippers or People of the Book - is Haraam (prohibited), whether that imitation is of their worship - which is the most serious form - or of their customs and behaviour. This is indicated by the Quran, Sunnah and Ijmaa.