My office Christmas party is at my boss's house which is very close to the office itself. It is on Wednesday after work. We end work at 5pm. Out of 11 employees, 9 of us live 30 mins away (so an hour total driving home then driving back). When asked when the party starts, his reply was "well go home and collect your spouses, then come back when you're ready." When would you show up? We are eating a casual buffet style meal too, if that matters.