Best time of the day to exercise?!

Best time of the day to exercise?

I am a housewife so I pretty much make my own schedule. I wonder whats the best time of the day to exercise to get the fastest results? Is there a time when metabolism is highest? I like to jog, do crunches and taebo.

I'm of mixed opinion on this.
I understand the logic to work out in the morning and get your metabolism set for the day, but I was able to lose 5 lbs a week for several weeks, by doing Tae Kwon Do for an hour at 9:00 PM.