quite happy to be told aibu ...I am 36, married with 3 dc of my own so perhaps I should just get over it fgs. I am also aware that many people reading may not be seeing dps as they have lost them, so I really apologise if this upsets anyone 
back story. my dparents have always gone to my aunt and uncle's place over 100 miles away and stay from xmas eve to new years day. as a child i would to go with them (but as I got to late teens / 20s I would drive down separately and come home earlier) ....then when I had first DC go for just a couple of days. then it just got too difficult the more dc i had, and now we don't even get invited anymore. my younger db and his dw go as well (who are child free atm)
I have to see it all over FB and just feel so left out. It really pisses DH off that they go and don't see us/the dc, and he feels that even if we were invited we shouldn't have to "follow them down there" anyway (his words)
last few years, on actual xmas day, we have visited PILS. but last year we just stayed at home for the first time ever (for me) and it was so weird. by 4pm I was stir crazy and pretty low tbh. and this year we will be at home too as not been asked anywhere.
my mum and dad do a flying visit xmas eve at some point to basically dump presents and run. But they make me feel like its kind of an inconvenience to them ie last year they didn't even take their coats off, just in too much of a hurry to get to my aunts place, my dc were sort of bemused tbh
just makes me sad. I miss my dps at christmas and also feel left out...I also cant imagine not wanting to spend xmas with my dc as long as they want me to, esp if I am fortunate enough to ever have gdc. I dunno. I guess I have this image in my mind of big family Christmases but its not the reality is it?