Headcount needed 1 month in advance?

Hi all,

We recently booked our venue and I LOVE it. It's an all-inclusive venue so when we sign our contracts they let us know when we would need certain things by or who to reach out to you to find out. They let us know that for catering we need our headcount 30 days prior. I've always heard something a little closer to 3 or even 2 weeks.
I'm not complaining or unhappy, just curious- is this normal? Or just slightly abnormal? Or way abnormal? Haha.

Honestly, I'm fine with it. My only possible concern is that I believe you usually request they return the RSVP 2 weeks before you need to turn in the final headcount, right?

So, that's a whole month and a half before the wedding. Is that reasonable? I don't want guests thinking I'm being unreasonable or something. Etiquette-wise, is this all okay?