The short answer is whenever you can get it in daily. I am up at 4:30 in the morning to get my workout in. I figure if I get it done first thing there are no excuses or interruptions.

I always do mine at 5am, I wake up early to actually get my workout in. If I did not do mine in the morning it would never get done with all the things I have to get done in the evenings. I did change my bed time to earlier in the evening to get adequate rest. The days I can't get to bed at a decent hour, I feel it the next morning and I dont push myself as much but I keep moving forward. I'm not really a morning person but getting up early and doing my workout has become routine and I love it

I do mine around 10am... i always have breakfast at about 7:30/8:00. i need the fuel to get through it cause i cant get through the workout on an empty stomach.