Other Available Clocks
Customize the World Clock to show your own list of cities (select up to 25 cities worldwide).
Event Time Announcer (Fixed Time Clock)Find out the corresponding local times around the world for the time selected.
Time Zone Conversions
Get the correct dialing codes to call between many locations worldwide. Displays the area codes for many countries.
Sun and Moon Information
Daylight Saving Time Information
About Daylight Saving Time (DST) – general information about DST.
History of Daylight Saving Time – general history about DST.
How Does Daylight Saving Time Work? – explains how the clocks transition for DST.
Health Solutions to DST – possible solutions on how to overcome the effects of DST.
Spring Forward, Fall Back and Similar Terms – an explanation on what these words mean.
“Daylight Savings Time” and other variations – variations of the term “Daylight Saving Time”.
Time Zone News - Important changes to time zones and DST worldwide.
Find out when Daylight Saving Time (DST) started and ended around the world in past years, and the planned dates for 2011 and 2012.
Time Zone Information
Time Zones General Information – explains what a time zone is, how time zones work, and more.
Time Zones History – historical background about time zones.
Time Zone Abbreviations – explains time zone names, such as GMT, EST, PST, and much more.
General information about time zones and daylight saving time (DST) in the following countries:
The Stopwatch offers lap/split times as well as alarms.
About the World Clock – explains how to use the World Clock.
About Leap Seconds – describes what seconds are and how they work.
About UTC – Coordinated Universal Time – explains Coordinated Universal Time (UTC).
GMT and Other Time Systems Explained – explains Greenwich Mean Time (GMT) and other time systems.
UTC vs CUT – background information about the UTC acronym.
Also have a look at The Date Menu with tools related to calculating dates and calendars.