Plank
Ref 24 hour rest periods. This is a extract from UK CAP371 and was specifically aimed at Charter airlines flying from UK to Orlando often via Bangor for fuel e.g. in the days that they used 757's. So outbound in the day and return at night.
On arrival in USA the (best practice) advice was to stay up as long as possible thus avoiding being awake at 0200 local time watching mickey mouse or bible programmes waiting for breakfast.
Some 20 years on the science says stick to departure local time, keep the iPad stocked up and have emergency rations. Then get up early and then nap before the night flight home.
This takes a serious amount of dedication and selfishness e.g. no I'm not being g social and or taking in the sights.
Not for every trip I agree and again it depends on the operation. At EK v difficult as the ops are so varied
And even with the above- fatiguing