Random mutations are the least potent source of change in evolutionary mechanisms. So much so that some experts don't even consider them as one.
Reinforcement of already existing traits through variation between individuals under environmental preasure is the main mechanism. (i.e. when food sources are high, individuals with longest reach are the fittest).
Won't the gifts also be a mere probabilitywave, and observing the space under the sciencemas tree would cause it to collapse into a single gift at a single location?
Each present is a real particle, but their distribution is affected by the self-interaction of quantum santa. This allows every present to have the same initial trajectory but different destinations.
There are a bunch of events who use holiday times for other things.
In German we refer the time from first christmas day to first day of the next year just as “between the years”. (Some other languages do that as well) It seems the English term for that is “twelve nights”. That refers to a lunar calendar (354 days) being a bit shorter than a solar calendar (365.2422 days), which means you need to add leap days after the last day of the year to synchronize it with a solar calendar and the seasons which correlate with it. The roman calendar actually started with march.
Though it wouldn’t be hard to give christmas and the time around it more sciency names. Christmas is based on the winter solstice, the Roman calendar had winter solstice on 25th december and they celebrated the birth of their sun god, where they had parties and exchanged gifts.
When I was a kid Darwin Klaus was played my dad. I play Darwin Klaus now. It is a great honour and a great responsibility among the hairless great apes. I love Sciencemas because it's a beautiful way to celebrate the great brain Nature gave us, and the great discoveries we made along the road.