Nothing really formal, except for maybe 10 years ago, when we did a professional photo session with all the women in the family - Mom, all of her daughters, daughter-in-law and the only granddaughter at the time. It was a birthday present for Mom.
Since then, I have, on occasion, forced the family at holiday gatherings, to pose for a group photo. Unfortunately, the photos don't include the animals since one nephew is allergic to dogs, and brother-in-law is allergic to cats.
Mom and Dad are in their mid 80s so I'll probably push for another group photo this year.
The Family (2 years ago)
The 'real' Family (and the photo we framed)