Source Information

• Time zone data source information

  Primary source:

  Wolfram|Alpha Knowledgebase, 2024.

  Background sources and references:

  • H. M. Nautical Almanac Office, United States Naval Observatory. "World Time Zone Map." Astronomical Applications Department. »
  • National Atlas of the United States, United States Geological Survey. "Time Zones of the United States." nationalatlas.gov. »
  • Time and Date AS. "Time Zone and Other Travel Tools." time and date.com. »
  • Twin Sun, Inc. Sources for Time Zone and Daylight Saving Time Data. »
  • WorldTimeZone.com. WorldTimeZone. »

This list is intended as a guide to sources of further information. The inclusion of an item in this list does not necessarily mean that its content was used as the basis for any specific Wolfram|Alpha result.

Requests by researchers for detailed information on the sources for individual Wolfram|Alpha results can be directed here.