Actually, no, it doesn't work that way now. You won't see the links until 12:01 am the day of flight (there might be an exception if it's one of the ANC-SEA flights that are superlate/superearly). We lost the 24 hour change as a chip chip chip™.

It kind of sucks to have to stay up super late if you want to do something like move up to an early in the morning flight (and not risk losing out on the seats while you sleep)...