History of standard time in the United States.
U.S. National Geodetic Survey provides a calendar that converts a typical calendar day to either the Day of Year or GPS Week number.
An illustrated history of timekeeping from ancient times to the present. A presentation of the National Institute for Standards and Technology Physics Lab.
The calendars for both the House of Representatives and the Senate from the 104th Congress (1995-1996) to the present.
History of daylight saving time and a brief calendar of the time change.
Find listings of past, present and future federal government holidays.
Presidential proclamations to celebrate special days, weeks and months.
Lists important dates and historic events in space and solar system exploration.
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.
Events from American history are illustrated by digitized items from the Library of Congress American Memory historic collections.
Reference /
Time
|