Fasting is limited with te following condition. Quran 2:187 "and eat and drink, until the white thread of dawn appear to you distinct from its black thread; then complete your fast Till the night appears;" So if it never dawns, or the sun almost never sets, it's impossible to exercise islamic fasting.

So instead of thinking sanely, people come up with "solutions" like 'then exercise your fasting according to meccahs timezone' and such.