National Institute of Standards and Technology (NIST), Physics LaboratoryA Walk through Time
A history of time through the ages.
Chaos Software Group, IncCurrent Local Time Anywhere
Will display the current local time anywhere. It has a list of countries and major cities.
WebExhibitsHistory of Daylight Saving Time
History of Daylight Saving Time
CIAMap of World Time Zones (CIA factbook) (PDF)
A map of world time zones.
Time and Date AS / Steffen ThorsenThe World Clock - Time Zones
Displays list of cities with local time. Many selections available. May select city by continent,
capital cities, and more.
Department of the NavyTime Zone Conversion
Table of conversions from UTC to some US time zones, standard and dailylight savings time.
US Naval ObservatoryUniversal Time and Greenwich Mean Time
Explains the similarities and differences between the two types of time standards.
Department of the NavyUniversal Time Gif Clock
GIf image of Universal Time
Department of the NavyWhat Are the U.S. Time Zones?
Table of how to determine time in any US time zone, given UTC time.
Contains a short history of standard time in the US.
U.S. Naval ObservatoryWhat is Universal Time? (U.S. Naval Observatory)
Explanation of Universal Time.
NASA/MSFC/ESSDWhat is UTC?
Description of Universal Time.
Department of the NavyWhat Time Is It?
Displays current UTC time, and current time in US time zones.
U.S. Naval ObservatoryWorld Time Zone Map
World time zones.
Department of the NavyWorld Time Zones
Information on World time zones, including maps, US law, and information by country.