Well that's interesting. Thanks for responding to my post. If you agree with me, why did you name uniform distribution as requirement number 1? Is that just part of the "official" academic definition or something?
TimeZones and DST are for humans and physical realities, such as the tilt of the earth and circadian rhythms. And they serve to address these things in a universal, coordinated way rather than asking each of us to change our schedules individually.
During DST, we all agree to start our days, open our business, and adjust our schedules one hour earlier, but without changing our individual clock times.
With DST all year long, can we choose to send our children to school at 9:30 instead of 8:30 during the winter? Should the school have a different winter schedule than a summer one? Or should we just wake up our young children well before dawn and drag them off?
I will guess that it's because there are a lot of candidates that will do fine in the more "human" parts of the interview, but cannot solve FizzBuzz. It's just more efficient to screen those out quickly, and save the human interviews for those who have already established a baseline technical capability.