Current mood: Coughing
Remembering is something that people used to do in the old days before the internet. It was slightly faster, but a lot less reliable. Most people still actually do have the ability to remember, but it is a lost art which is not practical to use it for general purposes. Modern remembering hobbyists find it most useful for copying things off google and taking them along on trips to primitive caves and rain forests and places. Remembering doesn’t take any electricity or special equipment, but nobody can remember why that matters.
As for this “Christmas” thing, I can explain. Christmas is an obscure winter festival with complicated religious connections. It has been associated at one time or another with everything from paganism, to catholicism, to protestantism, and back again. It falls on the day before (and the day after)