Just when I think I've got the answers, MikeT changes the questions!!
As it stands now, there is no "advantage". When your world is scheduled, each and every member of that world has no choice but to adhere to the schedule. If the final day of coach hiring / FA signing falls on December 25th (or December 28th) then every single member of the world has to deal with that.
If December 25th becomes a "non-event" day, then people who celebrate the holiday on that date do not have HBD responsibilities that day. But December 26th, a national holiday in other countries, is NOT afforded this consideration. Events would proceed, as scheduled, without consideration of their holiday. Now, that might be a tiny minority of the HBD customer base. But I maintain it is an ADVANTAGE if you get a "day off" on your holiday and our Canadian friends do not receive the same consideration theirs.
If you can't understand why establishing "American holidays" as "non-event" days for HBD is biased and unfair, I can't explain it any better to you. You get to eat turkey and spend time with your family with no HBD consequences. Anyone who doesn't celebrate on the 25th gets no "day off".