✅ There is no doubt celebrating Christmas and New Years is haram, because it is an imitation of the unbelievers. It is well known that the Muslims do not have any festival apart from ‘Eid al-Fitr and ‘Eid al-Adha , and the weekly “‘Eid” which is Friday (Yawm al-Jumu‘ah).
❗️Celebrating any other festival is not allowed and is either of two things:
1️⃣ either it is an innovation (bid‘ah), if it is celebrated as a means of drawing close to Allah, such as celebrating the Prophet’s Birthday (Mawlid) ;
2️⃣ or it is an imitation of the unbelievers, if it is celebrated as a tradition and not as an act of worship, because introducing innovated festivals is the action of the people of the Book who we are commanded to differ from.
❓ Can Muslims decorate their houses at Christmas?
❌ Decorating the house with balloons at Christmas is obviously joining in with the unbelievers and celebrating their festival
❓ Can Muslims put up a Christmas tree?
❌ It is not permissible to put up this tree in a Muslim house even if you do not celebrate Christmas , because putting up this tree comes under the heading of imitating others which is prohibited
📗 Shaykh Ibn ‘Uthaymin said:
“Similarly it is forbidden for the Muslims to imitate the unbelievers by holding parties on these occasions, or exchanging gifts, or distributing sweets or other foods, or taking time off work and so on, because the Prophet (ﷺ) said: “Whoever imitates a people is one of them.”
📗 Those who do any of these things are sinning, whether they do it to go along with them, or to be friendly towards them, or because they feel too shy (to refuse to join in) or any other reason, because it is a kind of compromising the religion of Allah to please others, and it is a means of lifting the spirits of the unbelievers and making them proud of their religion.” (Fatawa Ibn ‘Uthaymin, 3/44)
❓Can a Muslim greet a non-Muslim on his festival holiday like Christmas or Thanksgiving?
➡️ Greeting the non-Muslims on Christmas and other religious holidays like Thanksgiving is prohibited by consensus because it implies that one accepts or approves of their rituals of disbelief, even if one would not accept those things for oneself.
🌐 Source: https://islamqa.info/amp/en/answers/145950
https://islamqa.info/amp/en/answers/161539
📜 An-Noor Al-Mubeen Project