On Fable 2 how do you make an evil sacrifice at midnight?

get married, make your spouse follow you to the temple of shadows and sacrafice him/her at midnight. easy way to determine when midnight is is to make your spouse follow you to the Bowerstone Market town square where the clock is - when the time is 8:00 a.m.- warp travel to the temple of shadows and sacrafice your spouse. it takes 16 hours from bowerstown market to get to the temple of shadows- so you should arrive at Temple exactly at midnight if you leave Town Square at 8:00 a.m.