Holidays are only part of the issue and really only relevant in the fact that more pilots are likely to want time off. With the creation of holiday pay, we might even see coverage drop further down the list. Even a popular summer holiday like July 4th wasn't a reserve coverage award for ATL 320/737. The 320 didn't even have a single coverage trip. Reserve coverage days started out as July 5 and 13 then ended up being mostly just weekends the rest of the bid. Coverage awards are based, primarily, on trips as they stack up throughout the bid run. If every single pilot asked for every single weekend off, coverage awards (aka unstacking) would happen to every single pilot below like 60%, every month.