“Congratulating the kuffaar on the rituals that belong only to them is haraam by consensus, as is congratulating them on their festivals and fasts by saying ‘A happy festival to you’ or ‘May you enjoy your festival,’ and so on. If the one who says this has been saved from kufr, it is still forbidden. It is like congratulating someone for prostrating to the cross, or even worse than that. It is as great a sin as congratulating someone for drinking wine, or murdering someone, or having illicit sexual relations, and so on.”
“So when you celebrate somebody else’s holidays, another religion’s holidays it’s actually very, very dangerous, even more dangerous than other things you could be doing with them.”
“When we imitate the non-Muslims, the danger of this is the Prophet he said (Arabic) ‘Whoever imitates a nation, is from it’ so it’s a serious thing.
“…this is what a lot of Muslims don’t understand, a lot of these holidays…Christmas, celebrating birthdays, a lot of these things people don’t realise the dangers of them…it’s haram in any way, shape or form for a Muslim to take part in Valentines Day, whether he celebrates it himself, even helping others celebrate it. Selling things in your store that has to do with Valentines Day is haram, it’s a major sin. Doing anything that helps non-Muslims, and especially if you help Muslims even worse. And that’s why the scholars they said that celebrating any holiday, or making a new holiday in Islam, making a new EID in Islam, a new holiday, it’s haram. Even if it’s for a Muslim holiday, you make it into Islam, that’s haram. But when you make it something which comes from the non-Muslims it make sit even more haram, even more dangerous.”