This is a tricky question because I have to many but most of them would celebrate it in small company. Nathan and his grandparents would try to celebrate it with the whole family but since Nathan's mother has a difficult life and he doesn't know his father the meetings were getting a bit uncomfortable so his grandparents decide to just meet with a few members.
Liam would be the kind who wouldn't put any effort to celebrate wishing some company (at least before meeting Jo) while Jo would celebrate it with the family and friends and wishing for a more reduced parties.
Dave would simply not care at all and in some cases to sneak in parties he hasn't been invited to