Comment Advantages and disadvantages (Score 3, Insightful) 231
DST is not dumb.
It trades the cumbersome problem of change time two times per year, and lots of problems with systems and doesn't implement internal timezones or at least automatic time change for a useful synchronization of regional schedules changes.
Sunlight is not something you can ignore. You can make a trick with the clocks like DST, you can change the schedules so you replicate somehow the same but without the need of change the clocks, or you can just leave your schedules off the sunlight, which generate problems itself.
Of course, DST becomes useless in places to near the equator which suffer very little sunlight variation over the year or extremely high latitude with so strong variations that an hour doesn't make a significant difference.
But DST is a valid technique to realign sunlight and human behavior.
You can also use synchronized general schedule changes (using different summer/winter schedules), so remove DST isn't a big of a deal. But the most common complain (the day schedules/clocks changes) will remain just in another format.