Whenever you can do them consistently!
Personally, mornings work best for me work/ family/ training balance wise. Mid-volume, mid week are generally only an hour and half. Fuelling that day isn’t that important, more the day/ evening before, and then top up before (or early) in the workout if you feel the need.
It did take a while to get used to the intensity early in the day, and to adjust sleep patterns, but when I have to schedule evening’s now, I feel it hangs over me. Also, with mornings it doesn’t matter what stresses/ challenges/ curveballs the day brings - job done by breakfast suites me better now.