Is there any kind of special holidays at 343?

I hear and read about BBQ’s, fun game nights, and decorating with 343 members. Yet at other businesses/jobs they have a “Bring your kid to work/Daddy Daughter Day”, holiday/parties that you can bring your family over, and even an open house. Has 343 over done these kind of things*? Is there any other kind of tradition that 343 do like “Pie-In-The-Face” where you can have people pitch in money for a specific person to be … well pied and the top 3 do it? Would be funny to see certain staff with cream dripping off them.

*I ask this cause we hear from the people who work at 343, but they don’t really talk about if their family gets involved with Halo.