I think I now have the complete schedule and broadcast information for the Concours musical internationale de Montréal édition Chant 2018.
Tuesday May 29th, 3pm and 7.30pm: Art Song First Round
Wednesday May 30th, 3pm and 7.30pm: Aria First Round
Thursday May 31st, 7.30pm: Aria First Round
Friday June 1st, 3pm and 7.30pm: Art Song Semifinal
Sunday June 3rd, 3pm: Art Song Final
Monday June 4th, 7.30pm: Aria Semifinal
Tuesday June 5th, 7.30pm: Aria Semifinal
Thursday June 7th, 7.30pm: Aria Final, Prizes, Gala
Everything up to and including June 3rd takes place at the Salle Bourgie at the Montreal Museum of Fine Arts. The Aria semis and final take place at the Maison Symphonique at the Place des Arts.