In Spain something similar also happens: in August many companies let employees opt for "jornada intensiva" from 8am to 3pm instead of the usual 9am 6pm with an hour for lunch.

You end up so hungry doing that though :D

Only for the first week or so, your body adjusts. At least mine adjusts pretty easily based on when its used to eating.

Given that its pretty easy to go for a few days without eating, once you let your body adjust to it, this sounds plausible to me. Besides, on days when I’m not working, I can easily go until 4 or 5pm before eating (and then only eat once more before bed).

I've been doing that for more than five years. Not five summers: five whole years. I only very rarely eat at the office. I guarantee that your body will adjust after a little. In fact, you'll probably be surprised about how little it takes to get accustomed.

In fact, I think this is why intermittent fasting is somewhat easy to adopt: it's surprisingly fast to adapt your body to a different meal schedule, as long as you're eating as much as you need.

Happens in Tunisia too. (and probably more countries). There is a special administrative time for summer.

It is not a regular practice. This year, because of high electricity consumption, working hours was changed to 6:30-13:30 for government organizations. It was in effect for two months in hot cities. DST shift was applied at the start of spring anyways.