When to send in RD applications

Is there a good time to aim to get your applications in for RD?

Schools seem to have varied deadlines Dec 1, Jan 1 and Feb 1 but in general, I thought aiming for Nov-Dec would then miss the ED rush. It would seem to me RD applications aren’t really looked at until those are done but I really don’t know. When should they be sent?

Anytime before the deadline. It doesn’t really matter when.

does earlier submission mean they’ll probably send u admission/rejection letter sooner?