For over 100 years, we’ve had a rough international agreement about at what point the sun is directly overhead, because this is when we assign an arbitrary time known as “noon”. We’ve divided the world into “zones”, which for some reason makes sense.
Like most international agreements, it’s not perfect, and many governments have gone well out of their way to thoroughly botch and/or screw around with the implementation — so much so that, in some cases, the concept of a time zone really makes no sense at all. Given the rise of the internet, the massive synchronisation between continents in real-time, and the presence of global companies, it’s frankly a wonder why we even think time zones are a good idea anymore.
So let’s get rid of them!