Traditions often had a set sequence of events and everything that took place before and after the main act, for example, was subject to a certain temporal routine and ritual. For example, if a church service was scheduled for Christmas Eve, the meal was arranged according to what time the service took place.

Perhaps there were also certain things that were done for each time of day against this religious background. Since we have largely given that up in modern families, it doesn't really matter when exactly the meal takes place and can therefore be arranged according to the personal needs of the participants.
Of course, this makes things more difficult, because now you have left the predefined order and have to think for yourself when you want to do what and how. And the personal needs of one person contradict those of the other. It is at the same time a curse and a blessing that this orientation, which was valid for a long time for very many people, now no longer offers any, or that one is responsible oneself for how the festival is celebrated. Where before one simply never needed to think because everything had already been thought out, now it is a matter of moving flexibly within the spaces of need. If all people do the same thing at the same time of day, that gives a sense of security, but if individual households do everything differently, that requires skill in coming together.

For example, I am glad that the shops here are closed on Sundays and that there is this one common day when there is usually no work (exceptions prove the rule). The order created by rules is on the one hand alleviating and on the other hand aggravating, because people now rarely move in sync. I suspect tensions also stem from the fact that everyone is now called upon to act according to his or her own liking, but this clashes with where the tradition wants to be maintained urgently in individuals. I hear your sister :)

Self-made gifts, I like that! :D For some this is an imposition, for others a welcome occupation. One sneers at handmade because you can get it much better and nicer in store-bought form, the other finds appreciation in the act of doing it for someone else. You can't please anyone these days and so it's probably futile to try :)