> Because if my commute involves driving fifty miles east in the morning and fifty miles west in the evening, I don't want to have to adjust my clock by about 5

> Because if my commute involves driving fifty miles east in the morning and fifty miles west in the evening, I don't want to have to adjust my clock by about 5 minutes twice a day. You seem to think that I'm arguing against time zones. I'm not (here, anyway): I'm arguing that the time within a time zone be that of noon at its midpoint, so that no point within the timezone is more than 30 minutes from true noon (yes, some timezone are larger than an hour …), as opposed to those who want permanent DST, or even double DST, where clock noon might be hours from true noon.