I've seen some weddings where the groom is drunk.. BSProffy, maybe u just never got to attned such, but there are many around..
I went one before, the groom wasnt there to greet his guest as they leave. He was dead drunk in the room..
Summerkitty: agree with purpleblur, if you or ur parents want to seek geomancer, then better check with them. but if u are not superstitious, then just go ahead with a date that u like.
Me and FH originally wanted to take 23rd Dec too, but becos we're christians and most of our helpers are from church too, they'll be busy with christmas plans and activities too, so we didnt choose that date.