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

Nope you cannot. The Standby rule is for an 'Alternate Flight, Same Day'. So, if your flight left at 1pm on Thursday. Then, theorhetically, you could stand by for a flight that left anywhere from 1:01pm Wednesday until 12:59pm Friday - which would exclude that 1pm flight on both Wednesday and Friday.