The best time of day to be outside in my opinion is early morning. Quiet except for bird calls, peaceful, the air is fresh, unsullied by activity. A good time to be alone with your thoughts, let the mind drift as you walk along.
Being outside means a four legged companion who is happy to be wherever you are and just watching what is going on.
Fresh air, activity, walking, playing, running, garden, sun, rain, plants, trees, bush, lawn space, peace.