I Am a Muslim & I Do Not Celebrate New Year...!

Prophet sallallaahu `alayhi wa sallam said “He who imitates a people will be from among them (on the Day of Judgement).” Narrated by Abu Dawood, 3512; classed as saheeh by al-Albaani in Irwa’ al-Ghaleel, 269

And in another narration,

he sallallaahu `alayhi wa sallam ( may Allah exalt his mention ) said: “The one who imitates people other than us (i.e., in faith) is not from us. Do not imitate the Jews or the Christians.” [Tirmithi]