Originally Posted by lrdpenn

It appears to just be a bank 11PM Jan 4 to 1AM Jan 5, i.e., the night before the first weekday after the EOY holidays.

There was a late night Sunday after Thanksgiving bank a few years back, but that seems to have largely stopped. I think these were pre-COVID. Could be that with more flexible work arrangements, people were more able to travel outside of the classic "peak" holiday times, so no one really wanted the midnight flights from ORD/DFW, or westbound redeyes, anymore. I guess AA is trying it this year post-New Years, perhaps because most people will likely be traveling over the weekend based on where holidays fell this year.