I'm two months out from a Paris trip and a lunch at L'Astrance is at the top of my list. I have read about 10 different things regarding reservations -- 30 days out, two months, 9:30 a.m. Paris time, 10 a.m. Paris time, etc.
I woke up at 2:30 last night to call at 9:30 Paris time, only to get the recording (in very rapid French, which I couldn't decipher).
If you have booked there in the last two months:
• How far out were you allowed to book?
• What time did you call?