birthday party timing for Christmas birthday

My twins have their 4th birthday on December 27th, and this will be the first year we have a party where we invite peers - I want to invite their whole preschool class. Should I try to schedule it a few weeks before Christmas, or after New Years?

The twins are very birthday obsessed, and I would really like to make sure they have a least a few friends there - but we don’t have anyone that we’re close enough to that we can depend on to be there, so I’d like to pick a place to maximize potential participation.

Thinking we’d do something at an inside play place. Invites would say “no gifts please.”