Marking the civil New Year on December 31, and particularly the partying that is associated with it, is contrary to "Islamic and national values" in Turkey, the official body in charge of supervising Muslim clerics said.
A statement issued by the Office of Religious Affairs, which appoints preachers and also gives them guidelines for their weekly sermons, noted that December 31 falls this year on a Friday, which is the Islamic day of prayer.
It called on preachers to devote their sermons on that day to warning their flock against celebrations of the New Year.
"Today, the festivities held on the excuse of the New Year do not have any cultural or traditional foundations" in Turkey, the document said.
Such festivities, notably "doused in alcohol" were incompatible with the country's religious values, it added.
While a strictly secular state, Turkey has a population that is around 99 percent Muslim, according to official figures.