Clocks and Calendars Theme Page
This page provides some Web resources about the measurement of time.
Please read our disclaimer.
Walk Through Time
- A series of short essays on the history of timekeeping, from the National Institute of Standards and Technology (NIST) in the U.S. NIST keeps one of the world's main atomic clocks.
- This page generates a one-page printable calendar for this year or next,
with the public holidays for your country highlighted on the calendar and
listed below it. Several options allow you to customize the calendar’s
- A series of short illustrated essays on timekeeping through history, including
the modern atomic clock.
Worksheets and Lesson Plans
- EdHelper has a variety of printables and plans for time
- The Bulletin of the Atomic Scientists has maintained this famous clock
face in its journal since 1947. At the start of this millennium, it indicated
"nine minutes to midnight".
- Earth Calendar
- The national holidays of almost all the world’s countries, and all
major religions, are indexed for easy retrieval and viewing.
- Another indexed compendium of world holidays and special days, some with
a sentence or two of explanation.
Asked Questions about Calendars
- Klaus Tøndering of Denmark has assembled a vast FAQ about our calendar
– its origins, history, calculation, conventions, and comparisons to
- Multi Cultural Calendar
- KIDLINK has assembled this calendar from students’ contributions
all over the world. The children explain the national holidays of about 70
countries, plus a number of religious holidays.
- This page displays the official time in UTC and in the Western Hemisphere
time zones, directly from the atomic clock at the U.S. Naval Observatory in
Washington, DC. Through a fast modem in the U.S. and Canada, your displayed
"browser time" is within a second or two of atomic clock time.
- On this day in…
- A selection of anniversary sites, by curriculum topic.
History from the Library of Congress, U.S. events with links to historic
Also from History
Channel, with sub-topics like Old West History, Tech History, Vietnam
History Extensive list of events in Canada or by Canadians.
"Ephemerids" in the left column list literary events for this
Mathematicians who were born or died on this day, each linked to his or
her short biography.
- Science Notable
births, deaths, and events (discoveries, patents, debates etc.) in science.
with the Calendar
- This utility from the portal site TeachCanada.ca
displays a few key events or anniversaries in the coming month, each linked
to some resource pages that are suitable for student research about the event.
in your own school or district Website.
- Time and Date
- TimeAndDate.com shows the time in every time zone, and also when your online
chat/conference with groups around the world is best scheduled.
Note: For other theme pages in Information Technology, click the "previous screen" button below. Or, click here if you wish to return directly to the CLN menu which will give you access to educational resources in all of our subjects.