Hi Swee Ping,
Normally i don't advise clients to get married on that day coz you have to look at the time where the animal signs transit. For 2012, it will turn into dragon yr at 1818hrs.Hence unless you do everything after that (that is, signing of ROM papers, fetch the bride, tea ceremony etc), then it is ok, but not possible as tea ceremony and fetch the bride is still in the morning, Rabbti yr.
In addtion, for 2012, that day is still within 15 days of CNY, and normally due to chinese superstition, we don't hold wedding within the CNY period.