There will be many "Keep It Simple" entries. North Americans have the tendency to search for the complicated... to believe they should be more stressed than they are, that they are always underachieving somehow... WHEN IS THE BEST TIME OF DAY TO WORK OUT?
When your energy is the highest, or when you can fit it in. Yes there are many theories about what time of day is best - but the real answer is when it works best for you, enough to be consistent. Your workout is a great thing you're doing for your body. If you get something in for a day, pat yourself on the back. Every little bit is better than nothing, and is contributing to a healthier you.
And that is all.