that "new memory load" is functionally zero, since no one would have to remember that. By the time the Extra week actually arrived, people would have been looking forward to it for an entire year, and it would not catch anyone by surprise. No memory required. Even subterranean cave trolls would be aware it is coming.
I think it's a nice idea especially if we could have a big weeklong worldwide party once every 5 or 6 years
The corporate drone pessimist in me thinks that the extra week would just be another work week, with the best case being "Ah yes, you get an extra half-day worth of PTO this year."
Humans are slaves to traditions. If it's introduced as a world wide party week from the start then people will feel like "it's always been done that way" and be less likely to fight it.
I think it's a nice idea especially if we could have a big weeklong worldwide party once every 5 or 6 years