There's a societal pull in the direction of earlier time, even aside from anything about sunlight. Nobody wants to be "late" compared to their economic neighbors so they gravitate towards earlier time zones. This is correcting for that.
I suppose if you squint right at the western edge in summer time you could get there.
But the prime meridian runs straight through the country. I think a sensible reckoning would say that it's 1 hour off as a baseline and 1 extra hour during summer.
If you are interested, look for the historical reasons for that.
Edit: OK, a good source.
> On March 16th 1940, the clocks jumped from 23:00h to 00:00h to display the same time as Nazi Germany and other Nazi-occupied countries such as France and the Netherlands. This was an entirely politically motivated move to show support to the fascist government of Germany and showed no consideration for the natural cycle of the sun in Spain. According to the original 24-hour division of the world, Spain’s latitudinal position meant that GMT was the most natural time-zone for it to follow.
From: https://theculturetrip.com/europe/spain/articles/heres-why-s...
Spanish civil war was won by the fascists and Franco's dictatorship followed.
But yeah, assuming they want to do the magic in September: It would mean for countries where UTC+01:00 (standard time, winter time) makes more sense, they'd move to UTC+01:00 when the next switchover date in September shows up, whereas for countries where UTC+02:00 (daylight savings/summer time) makes more sense, they'd stay on that TZ past the September switchover date. They'd have to assign new names though, one can't have 1 timezone with 2 different names...
Every country that is currently UTC+01:00/UTC+02:00 ends up in either UTC+01:00 or UTC+00:00.
I have no opinion on the idea, just relaying what they are proposing.
And at least morning darkness means you don’t start your day with a commute that involves having your eyes melted by a just-over-the-horizon sun.