Lyra Festival

Question : What happens if two players meet the victory conditions of Lyra Festival the same Dusk?

Answer : The player that's earlier in turn order wins:
all At Dusk effects go simultaneously in the pool of effects (Limbo) at the beginning of the Dusk phase. Then in turn order, each player resolves all their effects.

Question : When do we check the resolution of Lyra Festival?

Answer : "At Dusk" effects are triggered at the beginning of the Dusk phase, before progression. Note that the check for three Characters satisfying the criteria happens upon triggering, at the beginning of Dusk (it's before the — ), not upon resolution. Other "At Dusk" effects cannot change the result for this Day.