Early bedtimes. I just don't get it. If you work during the day, when do you actually spend time with your kids if they are in bed by 7?
I have a theory on this, as I lived in France since my oldest was 5 months though I'm from the UK originally (left 20 years ago).
In France mums / parents generally:
Don't take longer than 6 months maternity leave
Don't become SAHM: it's considered very low status here. (Even if you don't work you still put your children in childcare)
Do have access to free/low cost state-provided all-day childcare options extending from 0730 to 1930 hours if necessary
Do have a long working day - so as to fit that 2 hour lunch break in
British / UK mums / parents OTOH generally:
Take longer maternity leave and being SAHM is far more common
Don't have access to cheap / free childcare so are pushed to being SAHM as it's so expensive
Can work part time / flexi time / have a short lunch to get away early - none of these things are normal in French workplaces. (A friends husband who insists on leaving at 5pm, having been in there since 7:30, is still wished Bon apres-midi by his colleagues when he leaves...)
So French parents genuinely often don't see their children from dawn till dusk, and they want to spend time with them in the evening. Plus French children are expected to nap up to the age of 4/5 years, so they can handle later nights.
British mums / parents OTOH are often home at 5pm, or don't work at all, or work part-time. And they are motivated to minimise childcare as it costs so much - so the children are with a parent a lot of the time. No wonder a 7pm bedtime appeals!