Sorry just a little confused on when the effects of midnight take place. So at the end of of players turn they advance the clock. Do they then draw a mythos card if its midnight or does the next player start his turn by doing so?
Plus, we have details in the official FAQ as well.
Midnight no longer occurs during a player’s turn. Instead,
it occurs immediately after any player’s turn in which the
clock hand moved to or past 12. Because midnight is not
part of a player’s turn, Kate Winthrop’s Science! ability
does not affect the appearance of monsters at midnight.
It might be easier to remember that Midnight doesn't happen during an Investigator's turn. While an active player may well draw and resolve the Mythos card, no Investigators are "active" during this time.
So, it shouldn't matter which player resolves the Mythos card.