Welcome to the world of standard time, where the only international rule is keeping your clocks in sync with UTC (aka Greenwich Mean Time).

Everything else is open season. Everyone chooses their own standard time offset; everyone chooses when to switch to daylight saving time (or even whether or not to use it at all); everyone chooses their own time zone boundaries. There aren’t orderly 15 degree-wide slices of the earth as intended, no sir. Many jurisdictions find it easier to manage their territory by having all of its territory under the same time zones, no matter how deviated from solar time they get. More often than not, time zones seem to get pushed to the east more often than they do to the west in order to take advantage of the sun.