All three of Celtic's home games in the Champions League group stage will be played on Wednesday nights.
UEFA have confirmed the fixture list for the 2012/13 competition, after the SPL champions were paired with Barcelona, Benfica and Spartak Moscow in Group G.
Celtic's campaign will get underway with a home game against Benfica on Wednesday, September 19, followed by an away trip to Spartak Moscow on Tuesday, October 2 with a 6pm kick-off.
A double header with Barcelona will then follow, travelling to Catalonia on Tuesday, October 23 before welcoming Tito Villanova's side to the east end of Glasgow on Wednesday, November 7.
Celtic's final away game of the group stage will be played at Benfica on Tuesday, November 20 before a home tie with Spartak Moscow to round off the six matches on Wednesday, December 5.
Information on games to be broadcast by STV will be announced in due course.
Celtic's fixtures in full
Wednesday, September 19: Celtic v Benfica
Tuesday, October 2: Spartak Moscow v Celtic
Tuesday, October 23: Barcelona v Celtic
Wednesday, November 7: Celtic v Barcelona
Tuesday, November 20: Benfica v Celtic
Wednesday, December 5: Celtic v Spartak Moscow