Well Whirly, you've cracked the dawn-to-dusk, so now try the three-day dusk-to-dawn.
A couple of years ago we set off in a C150 from Lincolnshire at 2230, flew to Cardiff, refuelled, flew out and landed at Eaglescott at first light (0400). After a day-time diversion to Perranporth and the Scillies we returned to Lands End, flying out from there at the beginning of official night on Midsummer's Day. Landed at Liverpool at 0130, set off at 0310 and landed at ... guess where! Carlisle at 0430, at first light (no lighting available at that hour!). Finding we were locked in (the airfield, not the Cessna) we squeezed into sleeping bags and slept in the C150 for 3 hours.
When management turned up they let us pitch tent in the area behind the restaurant. We slept all day, flew to Perth in the evening, set off from there at 0100, and landed back in Lincs at first light.
Timing was pretty critical since not many places had lighting available except the internationals, some of which were horrendously expensive for night-time refuelling (extra £35 at Cardiff, and £100 at Newcastle!)