Comment Re:Countries that do not change clocks use ST (Score 1) 241
Even though some regions or countries stay on a shifted time offset year-round (which might look or feel like being "ahead" like daylight saving time), standard time is legally and geographically considered the baseline time zone for those areas. They simply choose not to participate in the biannual clock adjustments.
Countries & Regions That Do Not Change Clocks Most of Asia: This includes major industrialized nations like China, India, Japan, and South Korea, as well as most of Southeast and Central Asia.
Most of Africa: Almost the entire African continent stays on a single standard time year-round.
Parts of the Middle East: While countries like Iran and formerly parts of the Levant have experimented with it, places like Turkey and several neighbors maintain fixed times.
Parts of Europe: Iceland, Belarus, Russia, Georgia, Armenia, and Azerbaijan do not practice seasonal time changes. (The European Union has debated abolishing the practice entirely, but member states still currently shift together).
Much of South and Central America: Countries like Argentina, Brazil (which abandoned nationwide DST a few years ago), and most of their neighbors remain on permanent standard time.
Erm... notice a pattern there?
Most of these nations are equatorial or not that far off it. Most of them between the 26th parallels. As you get closer to the equator, there is less difference between the hours of daylight between summer and winter, as you get further you get a greater differential.
In Perth, Western Australia (36 S) there's about a 3 hour difference, in London, UK (51 N) there's an 8 hour difference and this difference does not neatly line up around 12 PM so if you had permanent GMT you'd have the sun getting up at 3 AM in the summer disrupting sleep and if you kept permanent BST you'd have darkness until 9 AM in winter causing chaos on the way to work/school.
Perth doesn't have DST (but the eastern states do so that causes problems) because the differential in daylight hours isn't much of an issue (that and Perth is incredibly backwards and resistant to change but that is another discussion entirely) however London does because there is a huge difference in daylight hours between winter and summer.