Indonesia is located within four time zones, yet for the sake of practicality the westernmost one, which Aceh would fall into, is included into WIB a.k.a. western indonesian time.
blue: WIT (Waktu Indonesia Timur) = eastern indonesian time
green: WITA (Waktu Indonesia TengAh) = central indonesian time
yellow: WIB (Waktu Indonesia Barat) = western indonesian time
I won't list the names of the time zones in Russia, but as you can see, they stretch from Kamchatka Time (dark red) to Kaliningrad Time (dark green).
I've learned a few years ago that the countries down north look bigger because of the fact that our planet is like a ball, and since the Mercator map projection is one of the most widespread, we end up being acquainted to maps where Greenland is as large as Africa.
the further away from the equator you go, the bigger the size distortion becomes.
what I didn't realize for the longest time was that this also has an effect on the time zones.
a time zone (that is, 1 hour) is by definition a zone that covers 15° distance between two longitudes.
if you take the equator as a circle (360°) and divide it by 24 hour, then you get 15° for each hour.
unlike the distance between two latitudes, which stays the same whether you are on the equator or near the poles [equator to 15°S is the same distance as the north pole to 75°N], the distance between two longitudes [on the same latitude] get smaller the further away you go from the equator.
imagine the latitudes as rings hugging the earth.
the equator is the biggest ring, and the other rings get smaller the more you approach the poles.
yet each ring still has 360° and still gets divided to 24 x 15° a.k.a. 24 hour.
as a result, a time zone gets narrower to closer you get to the poles.
I did my maths and found that:
a time zone [15°] at..
- the equator = 1 667 km
- 10°N = 1 641 km
- 15°N = 1 610 km
- 30°N = 1 442 km
- 60°N = 832 km
- 78°N = 346 km
so a time zone at 60°N (or 60°S. but we'll use N because Russia is in the N.) is only half as long/wide as at the equator.
and Russia is deep in the north.
as you can see, Russia lies around 60°N (the yellow line), where a time zone is only half as large as on the equator.
a large part of the country even lies further north, where the time zones are even narrower.
one time zone, the Srednekolymsk [orange/beige one on the picture above, next to Kamchatka Time], lies almost completely north of 60°N.
Russia is indeed still very large, yet this has changed my view.
after all, Indonesia/Russia is not as small/huge as a I used to think, since on similar latitudes as Russia, Indonesia would have at least 7 time zones, and on the equator, Russia would have not even half the number of time zones it has now.






