Originally Posted by
LuizMiranda
So, I think the answer to this will likely be no, but it doesn't hurt to ask.
The standby rule for AS is you can standby for a flight that is within 24hrs of your flight. So, does that mean, you could in fact standby for your same flight but the day earlier? That would be exactly 24 hrs.
Has anyone ever tried this? Maybe I'll go to the airport this weekend and entertain this idea

I don't think so. I tried that once in GEG and was told that the kiosks only allow check-in on the same day as your ticket. However, OLCI often does permit you standby or confirm for the prior day. But OLCI is only starts 24 hours ahead of time, so it wouldn't be possible to standby a full 24 hours in advance.