| PostgreSQL 9.1.14 Documentation | ||||
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   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 uses UT1 rather
   than 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.