The dates, times and venues for all the Round 1 qualifier ties were announced by the GAA a bit earlier on. Full details on that are here.
Our match against Monaghan has been confirmed for MacHale Park on Saturday week, 4th June, where throw-in will be 4pm. The game will be broadcast live on Sky Sports, who, I understand, had first dibs on what qualifier match to carry. That would have been a toss-up between our match and the other all-Division One game, between Armagh and All-Ireland champions Tyrone, and they obviously decided to go with the one in Castlebar.