| PostgreSQL 7.4.3 Documentation | ||||
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Table B-1 shows the tokens that are permissible as abbreviations for the names of the month.
Table B-1. Month Abbreviations
| Month | Abbreviations |
|---|---|
| April | Apr |
| August | Aug |
| December | Dec |
| February | Feb |
| January | Jan |
| July | Jul |
| June | Jun |
| March | Mar |
| November | Nov |
| October | Oct |
| September | Sep, Sept |
Note: The month May has no explicit abbreviation, for obvious reasons.
Table B-2 shows the tokens that are permissible as abbreviations for the names of the days of the week.
Table B-2. Day of the Week Abbreviations
| Day | Abbreviation |
|---|---|
| Sunday | Sun |
| Monday | Mon |
| Tuesday | Tue, Tues |
| Wednesday | Wed, Weds |
| Thursday | Thu, Thur, Thurs |
| Friday | Fri |
| Saturday | Sat |
Table B-3 shows the tokens that serve various modifier purposes.
Table B-3. Date/Time Field Modifiers
| Identifier | Description |
|---|---|
| ABSTIME | Key word ignored |
| AM | Time is before 12:00 |
| AT | Key word ignored |
| JULIAN, JD, J | Next field is Julian Day |
| ON | Key word ignored |
| PM | Time is on or after 12:00 |
| T | Next field is time |
The key word ABSTIME is ignored for historical reasons: In very old releases of PostgreSQL, invalid values of type abstime were emitted as Invalid Abstime. This is no longer the case however and this key word will likely be dropped in a future release.
Table B-4 shows the time zone abbreviations recognized by PostgreSQL in date/time input values. PostgreSQL uses internal tables for time zone input decoding, since there is no standard operating system interface to provide access to general, cross-time zone information. The underlying operating system is used to provide time zone information for output, however.
Keep in mind also that the time zone names recognized by SET TIMEZONE are operating-system dependent and may have little to do with Table B-4. For example, some systems recognize values like 'Europe/Rome' in SET TIMEZONE.
The table is organized by time zone offset from UTC, rather than alphabetically. This is intended to facilitate matching local usage with recognized abbreviations for cases where these might differ.
Table B-4. Time Zone Abbreviations
| Time Zone | Offset from UTC | Description |
|---|---|---|
| NZDT | +13:00 | New Zealand Daylight-Saving Time |
| IDLE | +12:00 | International Date Line, East |
| NZST | +12:00 | New Zealand Standard Time |
| NZT | +12:00 | New Zealand Time |
| AESST | +11:00 | Australia Eastern Summer Standard Time |
| ACSST | +10:30 | Central Australia Summer Standard Time |
| CADT | +10:30 | Central Australia Daylight-Saving Time |
| SADT | +10:30 | South Australian Daylight-Saving Time |
| AEST | +10:00 | Australia Eastern Standard Time |
| EAST | +10:00 | East Australian Standard Time |
| GST | +10:00 | Guam Standard Time, Russia zone 9 |
| LIGT | +10:00 | Melbourne, Australia |
| SAST | +09:30 | South Australia Standard Time |
| CAST | +09:30 | Central Australia Standard Time |
| AWSST | +09:00 | Australia Western Summer Standard Time |
| JST | +09:00 | Japan Standard Time, Russia zone 8 |
| KST | +09:00 | Korea Standard Time |
| MHT | +09:00 | Kwajalein Time |
| WDT | +09:00 | West Australian Daylight-Saving Time |
| MT | +08:30 | Moluccas Time |
| AWST | +08:00 | Australia Western Standard Time |
| CCT | +08:00 | China Coastal Time |
| WADT | +08:00 | West Australian Daylight-Saving Time |
| WST | +08:00 | West Australian Standard Time |
| JT | +07:30 | Java Time |
| ALMST | +07:00 | Almaty Summer Time |
| WAST | +07:00 | West Australian Standard Time |
| CXT | +07:00 | Christmas (Island) Time |
| MMT | +06:30 | Myanmar Time |
| ALMT | +06:00 | Almaty Time |
| MAWT | +06:00 | Mawson (Antarctica) Time |
| IOT | +05:00 | Indian Chagos Time |
| MVT | +05:00 | Maldives Island Time |
| TFT | +05:00 | Kerguelen Time |
| AFT | +04:30 | Afghanistan Time |
| EAST | +04:00 | Antananarivo Summer Time |
| MUT | +04:00 | Mauritius Island Time |
| RET | +04:00 | Reunion Island Time |
| SCT | +04:00 | Mahe Island Time |
| IRT, IT | +03:30 | Iran Time |
| EAT | +03:00 | Antananarivo, Comoro Time |
| BT | +03:00 | Baghdad Time |
| EETDST | +03:00 | Eastern Europe Daylight-Saving Time |
| HMT | +03:00 | Hellas Mediterranean Time (?) |
| BDST | +02:00 | British Double Standard Time |
| CEST | +02:00 | Central European Summer Time |
| CETDST | +02:00 | Central European Daylight-Saving Time |
| EET | +02:00 | Eastern European Time, Russia zone 1 |
| FWT | +02:00 | French Winter Time |
| IST | +02:00 | Israel Standard Time |
| MEST | +02:00 | Middle European Summer Time |
| METDST | +02:00 | Middle Europe Daylight-Saving Time |
| SST | +02:00 | Swedish Summer Time |
| BST | +01:00 | British Summer Time |
| CET | +01:00 | Central European Time |
| DNT | +01:00 | Dansk Normal Tid |
| FST | +01:00 | French Summer Time |
| MET | +01:00 | Middle European Time |
| MEWT | +01:00 | Middle European Winter Time |
| MEZ | +01:00 | Mitteleuropäische Zeit |
| NOR | +01:00 | Norway Standard Time |
| SET | +01:00 | Seychelles Time |
| SWT | +01:00 | Swedish Winter Time |
| WETDST | +01:00 | Western European Daylight-Saving Time |
| GMT | 00:00 | Greenwich Mean Time |
| UT | 00:00 | Universal Time |
| UTC | 00:00 | Universal Coordinated Time |
| Z | 00:00 | Same as UTC |
| ZULU | 00:00 | Same as UTC |
| WET | 00:00 | Western European Time |
| WAT | -01:00 | West Africa Time |
| FNST | -01:00 | Fernando de Noronha Summer Time |
| FNT | -02:00 | Fernando de Noronha Time |
| BRST | -02:00 | Brasilia Summer Time |
| NDT | -02:30 | Newfoundland Daylight-Saving Time |
| ADT | -03:00 | Atlantic Daylight-Saving Time |
| AWT | -03:00 | (unknown) |
| BRT | -03:00 | Brasilia Time |
| NFT | -03:30 | Newfoundland Standard Time |
| NST | -03:30 | Newfoundland Standard Time |
| AST | -04:00 | Atlantic Standard Time (Canada) |
| ACST | -04:00 | Atlantic/Porto Acre Summer Time |
| EDT | -04:00 | Eastern Daylight-Saving Time |
| ACT | -05:00 | Atlantic/Porto Acre Standard Time |
| CDT | -05:00 | Central Daylight-Saving Time |
| EST | -05:00 | Eastern Standard Time |
| CST | -06:00 | Central Standard Time |
| MDT | -06:00 | Mountain Daylight-Saving Time |
| MST | -07:00 | Mountain Standard Time |
| PDT | -07:00 | Pacific Daylight-Saving Time |
| AKDT | -08:00 | Alaska Daylight-Saving Time |
| PST | -08:00 | Pacific Standard Time |
| YDT | -08:00 | Yukon Daylight-Saving Time |
| AKST | -09:00 | Alaska Standard Time |
| HDT | -09:00 | Hawaii/Alaska Daylight-Saving Time |
| YST | -09:00 | Yukon Standard Time |
| MART | -09:30 | Marquesas Time |
| AHST | -10:00 | Alaska/Hawaii Standard Time |
| HST | -10:00 | Hawaii Standard Time |
| CAT | -10:00 | Central Alaska Time |
| NT | -11:00 | Nome Time |
| IDLW | -12:00 | International Date Line, West |
Australian Time Zones. There are three naming conflicts between Australian time zone names and time zone names commonly used in North and South America: ACST, CST, and EST. If the run-time option australian_timezones is set to true then ACST, CST, EST, and SAT are interpreted as Australian time zone names, as shown in Table B-5. If it is false (which is the default), then ACST, CST, and EST are taken as American time zone names, and SAT is interpreted as a noise word indicating Saturday.