|A Walk Through Time | physics.nist.gov/GenInt/Time/time.html
Ancient calendars, early clocks, world time scales and time zones, NIST time services and more, from the
National Institute of Standards and Technology (NIST).
Complete Sun and Moon Data
for One Day | aa.usno.navy.mil/data/docs/RS_OneDay.html
Obtain the times of sunrise, sunset, moonrise, moonset, transits of the Sun and Moon,
and the beginning and end of civil twilight, along with information on the Moon's phase by specifying the
date and location.
Daylight Saving Time | en.wikipedia.org/wiki/Daylight_saving_time
Daylight saving time (DST) origin, observation, rationales, criticism, trivia.
Greenwich Mean Time (GMT)
Current Greenwich Mean Time and world times.
International Bureau of Weights and Measures (BIPM) | bipm.org/en/home
The task of the BIPM is to ensure world-wide uniformity of measurements and their traceability to the
International System of Units (SI).
Military & Civilian Time
Designations | wwp.greenwichmeantime.com/info/timezone.htm
From A - Z, a listing and description of the 25 integer World Time Zones from -12
through 0 (GMT) to +12.
Set Your Computer Clock Via the Internet |
Allows users to synchronize computer clocks via the Internet. The time information provided by the service
is directly traceable to UTC (NIST). The service responds to time requests from any Internet client in
several formats including the DAYTIME, TIME, and NTP protocols.
The Official U.S. Time
This web site is intended as a time-of-day service only. It should not be
used to measure frequency or time interval, nor should it be used to establish traceability to NIST or the
Time and Date.com | timeanddate.com
counters, calendar, time zone and other travel tools, world clock - time zones.
Time Service Department | tycho.usno.navy.mil
The Official Source of Time for the Department of Defense (DoD) and for the
Global Positioning System (GPS), and a Standard of Time for the United States.
Time Standards | scienceworld.wolfram.com/astronomy/Time.html
Information on c dynamical time (TDB), ephemeris time (ET), Greenwich apparent sidereal time (GAST),
Greenwich mean sidereal time (GMST), international atomic time (TAI), mean solar time, and more.
Time Travel | pbs.org/wgbh/nova/time
Companion web site to the
NOVA program "Time Travel," originally broadcast on October 12, 1999. In the program, leading physicists
delve into the mystery of whether time travel is possible, and if so, how one might go about building a
Time Zone Converter | timezoneconverter.com
Find out the time
anywhere in the world.
Time | en.wikipedia.org/wiki/Time
Just about everything you ever
wanted to know about time, from Wikipedia.
When does Daylight Saving
Time/Standard Time begin? | nist.gov/public_affairs/faqs/qdaylite.htm
Information from NIST the National Institute of Standards &
Worldtimeserver | worldtimeserver.com
Provides correct and
current time in any world time zone, country or major city. Accurate adjustments for Daylight Saving Time
(or Summer Time) are made according to each location's rules and laws.
WorldTimeZone | worldtimezone.com
Provides the world a
free service and reference resource on global time, time maps, meeting planner / time zone tools.
Article by Harold F. Maybeck, Meteorologist/ Lecturer - Natural Sciences Department, Plymouth State
College, Plymouth, New Hampshire.