Thomas G. Shanks

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Thomas G. Shanks (born April 9, 1942 in Lima, Ohio[1]) is an American computer programmer, author, and time zone history researcher.


While working for a San Diego based astrological computing company as programmer and research director, Shanks did extensive research in the field of worldwide timezone and daylight saving time history. He published the results of this research in the two volumes The American Atlas[2] and The International Atlas.[3] Shanks' published data are quoted frequently in the public domain IANA time zone database.


  1. ^ "Shanks, Thomas". Astro-Databank.
  2. ^ The American Atlas: US latitudes and longitudes, time changes, and time zones, San Diego 1978, ACS publications
  3. ^ The International Atlas: World latitudes, longitudes, and time changes, San Diego 1985, ACS publications