The idea of adapting to a longer day is not new. Besides other recent questions here, I recall it in When Worlds Collide (or its sequel).
As I'm rewarming half a pizza for a late meal, I wonder how society will change in this specific manner?
What do you call the different meals? What traditions and workflow will develop around this biological anchor?
example: Lunch is made intentionally to have leftovers. Dinner is a big social time and gathering. Then late meal will quickly grab the reserved portion from lunch. So what is it called?
If you don't have left-lunch prepared, you'll just grab junkfood instead. So it became important to plan this, but not take more time away for cooking. How will people naturally organize their longer wake periods around such biological anchors and cultural inertia?