Re: commercialism - surely it's as commercial as you make it? Ours is slightly commercial atm, but have plans to take a bit more care about making stuff once ds2 is school age too (as I'm going to have ALL this extra time in the day... don't disillusion me ), but fundamentally for us it's to think about the other person and do something nice/special.
Yes, my kids know that their little gift is from me, just as I know that the badly cut out tissue paper hearts stuck on a slighty squiffy red card and scribbled over in crayon is from ds2.
We do stuff on other days too to make the year a bit more special, like pancake day, for example.
We don't do Lent. I have no intention of having that any part of our family rituals at all. A great many people do, though. Do I think them weirdy? No. Would I stop either of the dses giving up something for Lent if they spontaneously chose to? No.
I honestly do think it's really weird to be so wrapped up in what somebody else celebrates in their family. I also find it really sad that Oblomov is questioning her beautiful card made for her by ds.
It's the same with Christmas. You know, if you hate it and think it's over commercialised and don't want to participate... fine. Just don't piss on everyone else's parade.