What time is lunch?

When people in London suggest a time for lunch, they suggest 1pm. In the US it would be noon, right? I find that curious.

I suspect this is a case where it’s kind of arbitrary what time you go to lunch, but people have just converged on a standard practice, and that practice is different in the US and the UK. (You would think there would be an incentive to go a little earlier to avoid the crowds, but on the other hand it’s probably useful for remembering lunch dates to just go with the standard time.) This is therefore a case of what social science types call a coordination game, in which there are “multiple equilibria.” If everyone else is going to lunch at 1, you go at 1; if everyone else is going at noon, you go at noon; so once a society has converged on a equilibrium lunchtime, it is hard to shake (even if you started down that route for random reasons).

I have not yet determined whether the workplace calendar is generally shifted back an hour or not. I walked to work at around 8:45 this morning and it seemed like rush hour to me.

Also, I checked, and sunrise and sunset are not generally later here in London than in NYC.

I wonder if there’s an interesting story explaining why London started down the 1pm path and e.g. NYC went with noon. Also, is it the same in other cities in the UK? In Europe?