My mom, when she first became a grandma, used to make jammies for my son, then she started making him christmas jammies every year. Then my brothers got jealous so she made them flannel jammie pants (and applique'd on a tshirt), when my sister had kids, she just naturally fell into the making jammies for everyone. So now she makes jammies for the little kids and does flannel/cotton pants with applique'd t-shirt for the adults every year. They go to the kids mass on christmas eve night, then drive around looking at lights then come home and open them. We all wear them all day on christmas day when we open presents. It is a real chore finding the right material for everyone, mom starts on the after christmas sales.
but everyone wears their jammies year round, but always look forward to the new ones at christmas. Now that we are all older, to be honest, the jammies are the best gift of all!