Can a muslim celebrate a non muslim holiday?
All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Greeting the kuffaar on Christmas and other religious holidays of theirs is haraam, by consensus, as Ibn al-Qayyim, may Allah have mercy on him, said in Ahkaam Ahl al-Dhimmah: "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. Many of those who have no respect for their religion fall into this error; they do not realize the offensiveness of their actions. Whoever congratulates a person for his disobedience or bid’ah or kufr exposes himself to the wrath and anger of Allah."
Congratulating the kuffaar on their religious festivals is haraam to the extent described by Ibn al-Qayyim because it implies that one accepts or approves of their rituals of kufr, even if one would not accept those things for oneself. But the Muslim should not aceept the rituals of kufr or congratulate anyone else for them, because Allah does not accept any of that at all, as He says (interpretation of the meaning): " If you disbelieve — indeed, Allah is Free from need of you. And He does not approve for His servants disbelief. And if you are grateful, He approves [i.e. likes] it for you. . ." [Quran 39:7]
". . . This day I have perfected for you your religion and completed My favor upon you and have approved for you Islam as religion. . ." [al-Maa’idah 5:3] So congratulating them is forbidden, whether they are one’s colleagues at work or otherwise.
If they greet us on the occasion of their festivals, we should not respond, because these are not our festivals, and because they are not festivals which are acceptable to Allah. These festivals are innovations in their religions, and even those which may have been prescribed formerly have been abrogated by the religion of Islam, with which Allah sent Muhammad (peace and blessings of Allah be upon him) to the whole of mankind. Allah Says (what means): "And whoever desires other than Islam as religion-never will it be accepted from him, and he, in the Hereafter, will be among the losers." [Quran 3:85]
It is haraam for a Muslim to accept invitations on such occasions, because this is worse than congratulating them as it implies taking part in their celebrations.
Similarly, Muslims are forbidden to imitate the kuffaar by having parties on such occasions, or exchanging gifts, or giving out sweets or food, or taking time off work, etc., because the Prophet (peace and blessings of Allah be upon him) said: "Whoever imitates a people is one of them." Shaykh al-Islam Ibn Taymiyah said in his book Iqtidaa’ al-siraat al-mustaqeem mukhaalifat ashaab al-jaheem: "Imitating them in some of their festivals implies that one is pleased with their false beliefs and practices, and gives them the hope that they may have the opportunity to humiliate and mislead the weak."
Whoever does anything of this sort is a sinner, whether he does it out of politeness or to be friendly, or because he is too shy to refuse, or for whatever other reason, because this is hypocrisy in Islam, and because it makes the kuffaar feel proud of their religion.
Allah is the One Whom we ask to make the Muslims feel proud of their religion, to help them adhere steadfastly to it, and to make them victorious over their enemies, for He is the Strong and Omnipotent.