List of Time Zone values

Support Center > API Integration

Published 02/04/2014 at 11:31pm UTC

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Details

What are the list of valid time zones when setting time zone for a user?

Answer

  1. Hawaiian Standard Time
  2. Alaskan Standard Time
  3. Pacific Standard Time
  4. US Mountain Standard Time
    • equivalent to Arizona Time 
  5. Mountain Standard Time
  6. Central Standard Time
  7. Canada Central Standard Time
  8. Eastern Standard Time
  9. Atlantic Standard Time
  10. Newfoundland Standard Time
  11. Dateline Standard Time
  12. UTC-11
  13. Pacific Standard Time (Mexico)
  14. Mountain Standard Time (Mexico)
  15. Central America Standard Time
  16. Central Standard Time (Mexico)
  17. SA Pacific Standard Time
  18. Venezuela Standard Time
  19. Paraguay Standard Time
  20. Central Brazilian Standard Time
  21. SA Western Standard Time
  22. Pacific SA Standard Time
  23. E. South America Standard Time
  24. Argentina Standard Time
  25. SA Eastern Standard Time
  26. Greenland Standard Time
  27. Montevideo Standard Time
  28. Bahia Standard Time
  29. UTC-02
  30. Mid-Atlantic Standard Time
  31. Azores Standard Time
  32. Cape Verde Standard Time
  33. Morocco Standard Time
  34. UTC
  35. GMT Standard Time
  36. Greenwich Standard Time
  37. W. Europe Standard Time
  38. Central Europe Standard Time
  39. Romance Standard Time
  40. Central European Standard Time
  41. W. Central Africa Standard Time
  42. Namibia Standard Time
  43. Jordan Standard Time
  44. GTB Standard Time
  45. Middle East Standard Time
  46. Egypt Standard Time
  47. Syria Standard Time
  48. E. Europe Standard Time
  49. South Africa Standard Time
  50. FLE Standard Time
  51. Turkey Standard Time
  52. Israel Standard Time
  53. Arabic Standard Time
  54. Kaliningrad Standard Time
  55. Arab Standard Time
  56. E. Africa Standard Time
  57. Iran Standard Time
  58. Arabian Standard Time
  59. Azerbaijan Standard Time
  60. Russian Standard Time
  61. Mauritius Standard Time
  62. Georgian Standard Time
  63. Caucasus Standard Time
  64. Afghanistan Standard Time
  65. Pakistan Standard Time
  66. West Asia Standard Time
  67. India Standard Time
  68. Sri Lanka Standard Time
  69. Nepal Standard Time
  70. Central Asia Standard Time
  71. Bangladesh Standard Time
  72. Ekaterinburg Standard Time
  73. Myanmar Standard Time
  74. SE Asia Standard Time
  75. N. Central Asia Standard Time
  76. China Standard Time
  77. North Asia Standard Time
  78. Singapore Standard Time
  79. W. Australia Standard Time
  80. Taipei Standard Time
  81. Ulaanbaatar Standard Time
  82. North Asia East Standard Time
  83. Tokyo Standard Time
  84. Korea Standard Time
  85. Cen. Australia Standard Time
  86. AUS Central Standard Time
  87. E. Australia Standard Time
  88. AUS Eastern Standard Time
  89. West Pacific Standard Time
  90. Tasmania Standard Time
  91. Yakutsk Standard Time
  92. Central Pacific Standard Time
  93. Vladivostok Standard Time
  94. New Zealand Standard Time
  95. UTC+12
  96. Fiji Standard Time
  97. Magadan Standard Time
  98. Tonga Standard Time
  99. Samoa Standard Time

 

For UTC equivalents, please reference Microsoft Time Zone Index Values.

 

Unique Time Zone Identification and Terminology

The list above is the set of Windows time zone IDs and can be generated using the Windows command "tzutil /l". We use the Windows name as our unique time zone identifier for two reasons: 1) because while many IANA time zone names can identify a single time zone (America/Toronto and America/New_York) if no "golden zone" is specifiec, there is only one Windows time zone exists per actual time zone; and, 2) our technology stack is based on Microsoft Windows and .NET, and so time zone implementation is super simple using the Windows time zone identifiers. We do display IANA time zones along with the Windows ID to make it easier for end users to select the correct time zone, however in our API we consume and supply only the above Windows IDs.
 
There is one potentially confusing aspect to using Windows IDs: the terminology of the time zones. The term “Mountain Standard Time” has one meaning when referring to a Windows time zone, and a different meaning when referring to a point in time. When dealing with a point in time, “Mountain Standard Time” would be differentiated from “Mountain Daylight Time” in New Mexico depending on the season, but a point in time in Arizona would be referred to as “Mountain Standard Time” all year round. Regardless of the season, the time zone of New Mexico is always referred to by Windows as “Mountain Standard Time” and the time zone of Arizona is always referred to by Windows as “US Mountain Standard Time”. It would be less confusing if Microsoft had just standardized on the time zone names “Mountain Time” and “Arizona Time”, but they didn’t. 
 
 

Daylight Savings Time Adjustments

Daylight savings time adjustments are handled automatically by our system. With respect to time zones that do not utilize daylight savings, here's a clarifying example: an Arizona resident should be in “US Mountain Standard Time” while a New Mexico resident should be in “Mountain Standard Time”. The Arizona resident would remain UTC-7 all year, while the New Mexico resident would be UTC-7 in the winter and UTC-6 in the summer. 

 

This article was last reviewed by our Support team on June 17, 2019.