When is the shortest daylight duration of the year in the Southern Hemisphere?
Places 15° west of Greenwich will be how long behind Greenwich Mean Time?
At what longitude will the time be 8:30pm when it is noon at Greenwich?
If a traveler leaves the U.S.A (W) at 5:00am on Wednesday 25th December and crosses the International Date Line he would arrive Japan (E) at 5:00am on which date?
One reason for the establishment of the International Date Line was to keep one location from having:
