Great questions! The conquest time was set to 12h still, to ensure it didn't perfectly synch with Night Bonus.
It is a 3 city world.
As far as night bonus goes - generally speaking I look at the feedback from the community when setting up future worlds, and with that in mind will not normally change it after it has been set.
But as this is a special 100th world, if there is a preference from a good majority of the community for no night bonus, I am okay to change that setting as a one time exception.