51.90. pg_timezone_names
  The view
  
   pg_timezone_names
  
  provides a list
   of time zone names that are recognized by
  
   SET TIMEZONE
  
  ,
   along with their associated abbreviations, UTC offsets,
   and daylight-savings status.  (Technically,
  
   PostgreSQL
  
  does not use UTC because leap
   seconds are not handled.)
   Unlike the abbreviations shown in
  
   
    pg_timezone_abbrevs
   
  
  , many of these names imply a set of daylight-savings transition
   date rules.  Therefore, the associated information changes across local DST
   boundaries.  The displayed information is computed based on the current
   value of
  
   CURRENT_TIMESTAMP
  
  .
 
   
    Table 51.91. 
    
     pg_timezone_names
    
    Columns
   
  
| Name | Type | Description | 
|---|---|---|
       
        name
       
       | 
      
       
        text
       
       | 
      Time zone name | 
       
        abbrev
       
       | 
      
       
        text
       
       | 
      Time zone abbreviation | 
       
        utc_offset
       
       | 
      
       
        interval
       
       | 
      Offset from UTC (positive means east of Greenwich) | 
       
        is_dst
       
       | 
      
       
        boolean
       
       | 
      True if currently observing daylight savings |