World Time Zone Map
- Map showing the world's time zones.
- http://aa.usno.navy.mil/faq/docs/world_tzones.html

Today in History
- Events from American history are illustrated by digitized items from the Library of Congress American Memory historic collections.
- http://memory.loc.gov/ammem/today/today.html

The Official U.S. Time
- Shows the official time in each time zone. A service provided by the National Institute of Standards and Technology and the U.S. Naval Observatory.
- http://www.time.gov/

NASA Solar System Launches and Events Calendar
- Lists important dates and historic events in space and solar system exploration.
- http://www.solarsystem.nasa.gov/calendar/

Proclamations Issued by President Bush
- Presidential proclamations to celebrate special days, weeks and months.
- http://www.whitehouse.gov/news/proclamations/

GPS Calendar
- U.S. National Geodetic Survey provides a calendar that converts a typical calendar day to either the Day of Year or GPS Week number.
- http://www.ngs.noaa.gov/CORS/Gpscal.html

Federal Holidays Calendars
- Find listings of past, present and future federal government holidays.
- http://www.opm.gov/fedhol/index.asp

When Does Daylight Saving Time Begin and End?
- History of daylight saving time and a brief calendar of the time change.
- http://aa.usno.navy.mil/faq/docs/daylight_time.html

Congressional Calendars
- The calendars for both the House of Representatives and the Senate from the 104th Congress (1995-1996) to the present.
- http://www.gpoaccess.gov/calendars/index.html

A Walk Through Time
- An illustrated history of timekeeping from ancient times to the present. A presentation of the National Institute for Standards and Technology Physics Lab.
- http://physics.nist.gov/GenInt/Time/