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.
Congressional Calendars: The calendars for both the House of Representatives and the Senate from the 104th Congress (1995-1996) to the present.
Federal Holidays Calendars: Find listings of past, present and future federal government holidays.
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.
NASA Solar System Launches and Events Calendar: Lists important dates and historic events in space and solar system exploration.
Proclamations Issued by President Bush: Presidential proclamations to celebrate special days, weeks and months.
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.
Today in History: Events from American history are illustrated by digitized items from the Library of Congress American Memory historic collections.
U.S. Time Zones: History of standard time in the United States.
When Does Daylight Saving Time Begin and End?: History of daylight saving time and a brief calendar of the time change.
World Time Zone Map: Map showing the world's time zones.