Time zone, a zone on the terrestrial globe that is approximately 15° longitude wide and extends from pole to pole and within which a uniform clock time is used. Time zones are the functional basis of standard time and were introduced in the late 19th century as railways connected places that had
Best Interactive Time Zone Map for Current Time Across US
Google Maps now has real-time arrival info for Metro
Geography of Time Zones - Geography Realm
World Time Zone Map
Map
Geography of Time Zones - Geography Realm
What is longitude?
Greenwich meridian Definition, History, Location, Map, & Facts
Time Zone Map, day zone
10 Lesser-Known Facts About Time Zones - Listverse
Nick's Best Weather Blog!: Why current thinking about time zones
Timezones overview worldwide
What Is The Biggest Time Difference Between Two Places On Earth
What Is a Time Zone?