Information about Time Scales and Leap Seconds see:

• Systems of Time Time Service Department, U.S. Naval Observatory, Washington, DC
• Le temps UTC/TAI Bureau International des Poids et Mesures, BIPM UTC/TAI Time Server
• Leap Seconds Time Service Department, USNO
• Modified Julian Date Frequently Asked Questions, Time Service Department, USNO
• Astronomical Time Keeping Astronomical texts for the layman
• Astronomical Calendars MAA Scholar Project
• Some basic information about the different time scales by Paul Schlyter
• Time Scales, UTC, and Leap Seconds From the Time and Frequency Users Manual
• Astronomical Times Richard Fisher, National Radio Astronomy Observatory
• Loran-C Timing Operations U.S. Naval Observatory, Washington, DC
• Loran-C Times of Coincidence (TOC) calculator
• International Earth Rotation Service (IERS) General Information
• A Few Facts Concerning GMT, UT, and the RGO by Richard B. Langley
• Time and Frequency FAQ Time & Frequency Division, NIST
• Leap Second and UT1-UTC Information Time & Frequency Division, NIST
• Time Scales Time Metrology, National Physics Laboratory (NPL)
• The Leap Second Time Metrology, National Physics Laboratory (NPL)
• Leap seconds: why and how Physikalisch-Technische Bundesanstalt (PTB)
• The Time of Internet Italian Standard Time, Guided Tour to Time Measurement
• The Australian National Time System The Second and International Atomic Time
• What are all those different kinds of time Astronomy Frequently Asked Questions
• Chandra, A Time Tutorial Definitions of various time systems and formulae
• The Times of your Life Solar Time, Julian Days, Sidereal Time
• Tidbits about TIME Archives of timezone.com
• Radio Time Checks Origins and Meaning of GMT/UTC
• 1972 Troubled Times Leap Seconds herold[sic] world-wide cataclysm (huh?)
• Leap Seconds Urban Legend (huh?)
• The Greenwich Meridian in the Space Age Time, Atomic Time, Longitude, etc.
• The world time system New Scientist
• History of the Prime Meridian - Past and Present by Jeremy Paul
• Time Physical fundamentals
• UTC New Years Y2K No leap second here!
• Earth rotation Difference in seconds between a UT1 and a TAI clock

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Last Updated - 07/13/04