## 52.93. `pg_timezone_abbrevs`

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 The view `pg_timezone_abbrevs` provides a list of time zone abbreviations that are currently recognized by the datetime input routines. The contents of this view change when the [timezone\_abbreviations](runtime-config-client.html#GUC-TIMEZONE-ABBREVIATIONS) run-time parameter is modified.

**Table 52.94. `pg_timezone_abbrevs` Columns**

|                          Column Type<br/><br/> Description                         |
|------------------------------------------------------------------------------------|
|                  `abbrev` `text`<br/><br/> Time zone abbreviation                  |
|`utc_offset` `interval`<br/><br/> Offset from UTC (positive means east of Greenwich)|
|     `is_dst` `bool`<br/><br/> True if this is a daylight-savings abbreviation      |

 While most timezone abbreviations represent fixed offsets from UTC, there are some that have historically varied in value (see [Section B.4](datetime-config-files.html) for more information). In such cases this view presents their current meaning.

