Add to that cultural and climate differencies and it makes it even harder to schedule things. Like there is not a huge difference between France and Spain in term of solar hour, but rhythm is different because people in the south are used to take their lunch break when at the hottest moment of the day and tend to stay outside and up longer because they are most pleasant in the summer.

Most people in europe keep scheduling meetings between 14 and 16 which is pretty much lunch time here in Spain so most of the time I am having lunch during my video calls or take a quick bite in between calls without a proper break.