PostgreSQL 9.0.4 Documentation
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45.60. 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. 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 45-61. pg_timezone_names Columns

NameTypeDescription
nametextTime zone name
abbrevtextTime zone abbreviation
utc_offsetintervalOffset from UTC (positive means east of Greenwich)
is_dstbooleanTrue if currently observing daylight savings
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pg_timezone_abbrevsUppg_user