Comment by pmontra

Adding to this social inertia concept, there are countries where work ends at 6pm, lunch is at 1pm or later and dinner at 8pm or later. I live in one of them. If somebody occasionally have dinner at 7pm s/he's laughed at. If it's a regular thing, well, that's so weird. I don't expect that those habits passed on by generations can be changed in one day.