The Belgium international shared a picture of himself in a Galatasaray shirt alongside the caption: “Eid Mabrouk to all.”
Eid al-Adha is the second of two religious holidays celebrated by Muslims worldwide each year. The religious holiday centres around the meat from a sacrificed animal being given to the poor and needy.
The on-loan Manchester City striker was born in Belgium and joined Galatasaray on a temporary move over the summer transfer window.
The 20-year-old has already established himself in the Galatasaray defence and has started the Lions last two games making both his Champions League debut against Atletico Madrid and his league debut in the 1-0 win against Trabzonspor at the Avni Aker stadium.
The young defender is expected to start for Galatasaray at the Türk Telekom Arena on Saturday 26 September in the Super League next.
Denayer was included in the latest edition of the Turkish-football.com Team of the Week.