Darren Summerville, a Georgia appellate lawyer, very kindly helped me pro bono as local counsel in Chan v. Ellis, back in the day, and is now helping me with a new case. I was talking to him about the briefing schedule, and he told me:
Initial NT Brief/Merits (20 days)
Initial EE Brief/Merits (20 days from filing of NT Brief)
NT Reply Brief (20 days post filing of EE Brief)
Took me a moment to figure out: Why NT and EE?