In the local time of each, during what times of the 24-hour day in January, and in July, is it the same day of the week in Canberra and in Honolulu? Canberra goes on daylight savings time in summer but Honolulu does not. Standard time in Canberra is GMT plus 10 hours, whereas Honolulu time is GMT minus 10 hours.

What would the answer be if somehow (by magic, perhaps) Australia and Hawaii were to be moved so that standard time in Canberra was GMT plus 12 hours and time in Honolulu was GMT minus 12 hours?

How would the answers to the questions above be affected if the International Date Line were moved to the prime meridian instead of being (roughly) directly opposite as it now is?

(In reply to re(4): first and second part (Spoiler) with ? on 3rd by Dej Mar)

I don't see how moving the date line changes any time zones. A time zone gives us a uniform time of day within the zone.  What day it is at a particular place is something else again. It is the same time of day 1 inch across the date line in one direction as it is in the other (given that the date line is not placed right at a time zone boundary) but the two directions correspond to days that are one day apart.

Your impressive knowledge of IDLE and IDLW, etc. seems to be obscuring the real issue.  And that is, why do you insist that the time zones have to change if the date line is moved.  What I want is for the time zones to all stay the same, but move the date line halfway around the world (more or less).  Can't this be done? If not, WHY NOT?

Posted by Richard on 2006-07-12 18:35:34