...submit material to a publisher? When the material is ripe? When the publisher is ripe? When the weather looks like it might be clear for a few weeks? When the gas prices drop?
Or is there a best time?
Or is there a best time?
Ripe?
Do publishers ripen? Do you tap on them with your knuckles and listen to how they sound? Check to see if they smell okay?
Never.
Submit to an agent instead.
But only on a day with an R in it, on a full moon, if your name is Cecily.