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 51.93. pg_timezone_names Columns
| Column Type Description | 
|---|
| 
        Time zone name | 
| 
        Time zone abbreviation | 
| 
        Offset from UTC (positive means east of Greenwich) | 
| 
        True if currently observing daylight savings |