Library of Congress
Loc: America's Story: Four Standard Time Zones Introduced
How and why did the United States come to have four time zones? Learn about how cities and railroad travel impacted the development of these zones. Includes video (requires RealPlayer).
Cuemath
Cuemath: Time
A comprehensive guide for learning all about time with definitions, history of time, time on a number line, time zones, telling time, solved examples, and practice questions.
E-learning for Kids
E Learning for Kids: Math: Dojo: Polygons and Time Zones
Students will play several learning games to explore polygons such as triangles, and how to determine the area of triangles and the different types of triangles. They will also explore time zones.
Extreme Science
Extreme Science: What Is the Time?
Take a walk through time as Extreme Science explains time starting with ancient calendars and early clocks to how the National Institute of Standards and Technology uses time today.
Smithsonian Institution
National Museum of American History: Our Story: All Aboard the Train!
Activities and resources, built around a reading of Jingle the Brass by Patricia Newman, for teaching young learners about the importance of railroads in American history.
Other
World Time Zone: Time Zone Abbreviations
What do all of those combinations of letters mean for time zones? Find out when you visit this site.
Other
Clari Net Internet Solutions: Mexico
Find out what time it is now in different parts of Mexico. Feel free to browse the times in other countries and regions from this site, too!
Other
Clari Net: Local Times Around the World
Click on a continent, and then a country to find out the current time. Includes date, time, latitude and longitude, local time zone, and whether or not the country is on standard time or daylight saving time.
Other
Time Zones for P Cs
This site from Time Zones for PCs provides a colorful, interactive maps of the United States and the world. Click on one of the starred cities to find out what time it is there.
Other
World Time Zone: Countries: Territories Operating Daylight Savings Time
Use this site to find the countries and territories operating daylight savings time and when it starts and ends.
Other
World Time Zones: Actual Time Check
This interesting site shows the current time in 30 countries around the world. The clocks on display show that the time and day are different in different locations and that some time zones are hours ahead or behind, but others are off...
Math Is Fun
Math Is Fun: World Time Zones
The interactive map displays the time zones of the world. An explanation of why the world is divided into different time zones is provided.
National Council of Teachers of Mathematics
Nctm: Figure This: What Time Is It In?
Can you figure this? If it is afternoon in San Francisco, California, what time is it in Cairo, Egypt? Explore positive and negative number values in this one page activity using time zones from different parts of the world.