The list above of “supported" abbreviations is also an abbreviated list..
if you want to see a fairly complete list, here is some code to generate it:
(and a small part of the output below to show some that are not in the list above)
unfortunately the OS will not use these extra zones) you’ll have to do a conversion to -0600 types
NSDate *myDate = [NSDate date];
NSDateFormatter *f = [[NSDateFormatter alloc] init];
[f setDateStyle:NSDateFormatterLongStyle];
[f setTimeStyle:NSDateFormatterLongStyle];
[f setDateFormat:@"ZZZ"];
NSArray *timeZoneNames = [NSTimeZone knownTimeZoneNames];
for (NSString *name1 in timeZoneNames)
{
NSTimeZone *tz = [NSTimeZone timeZoneWithName:name1];
[f setTimeZone:tz];
NSLog(@"%@ = \"%@\" = %d = %@", [tz abbreviation], name1, [tz secondsFromGMT], [f stringFromDate:myDate]);
}
2012-02-13 15:53:26.497 HelloWorld[23220:207] NZDT = "Pacific/Auckland" = 46800 = +1300
2012-02-13 15:53:26.498 HelloWorld[23220:207] CHADT = "Pacific/Chatham" = 49500 = +1345
2012-02-13 15:53:26.508 HelloWorld[23220:207] CHUT = "Pacific/Chuuk" = 36000 = +1000
2012-02-13 15:53:26.509 HelloWorld[23220:207] EASST = "Pacific/Easter" = -18000 = -0500
2012-02-13 15:53:26.510 HelloWorld[23220:207] VUT = "Pacific/Efate" = 39600 = +1100
2012-02-13 15:53:26.511 HelloWorld[23220:207] PHOT = "Pacific/Enderbury" = 46800 = +1300
2012-02-13 15:53:26.512 HelloWorld[23220:207] TKT = "Pacific/Fakaofo" = -36000 = -1000
2012-02-13 15:53:26.513 HelloWorld[23220:207] FJT = "Pacific/Fiji" = 43200 = +1200
2012-02-13 15:53:26.514 HelloWorld[23220:207] TVT = "Pacific/Funafuti" = 43200 = +1200
2012-02-13 15:53:26.515 HelloWorld[23220:207] GALT = "Pacific/Galapagos" = -21600 = -0600
2012-02-13 15:53:26.516 HelloWorld[23220:207] GAMT = "Pacific/Gambier" = -32400 = -0900
2012-02-13 15:53:26.518 HelloWorld[23220:207] SBT = "Pacific/Guadalcanal" = 39600 = +1100
2012-02-13 15:53:26.518 HelloWorld[23220:207] ChST = "Pacific/Guam" = 36000 = +1000
2012-02-13 15:53:26.520 HelloWorld[23220:207] HST = "Pacific/Honolulu" = -36000 = -1000
2012-02-13 15:53:26.521 HelloWorld[23220:207] HST = "Pacific/Johnston" = -36000 = -1000
2012-02-13 15:53:26.522 HelloWorld[23220:207] LINT = "Pacific/Kiritimati" = 50400 = +1400
2012-02-13 15:53:26.523 HelloWorld[23220:207] KOST = "Pacific/Kosrae" = 39600 = +1100
2012-02-13 15:53:26.524 HelloWorld[23220:207] MHT = "Pacific/Kwajalein" = 43200 = +1200
2012-02-13 15:53:26.526 HelloWorld[23220:207] MHT = "Pacific/Majuro" = 43200 = +1200
2012-02-13 15:53:26.527 HelloWorld[23220:207] MART = "Pacific/Marquesas" = -34200 = -0930
2012-02-13 15:53:26.528 HelloWorld[23220:207] SST = "Pacific/Midway" = -39600 = -1100
2012-02-13 15:53:26.529 HelloWorld[23220:207] NRT = "Pacific/Nauru" = 43200 = +1200
2012-02-13 15:53:26.530 HelloWorld[23220:207] NUT = "Pacific/Niue" = -39600 = -1100
2012-02-13 15:53:26.531 HelloWorld[23220:207] NFT = "Pacific/Norfolk" = 41400 = +1130
2012-02-13 15:53:26.564 HelloWorld[23220:207] NCT = "Pacific/Noumea" = 39600 = +1100
2012-02-13 15:53:26.565 HelloWorld[23220:207] SST = "Pacific/Pago_Pago" = -39600 = -1100
2012-02-13 15:53:26.566 HelloWorld[23220:207] PWT = "Pacific/Palau" = 32400 = +0900
2012-02-13 15:53:26.567 HelloWorld[23220:207] PNT = "Pacific/Pitcairn" = -28800 = -0800
2012-02-13 15:53:26.570 HelloWorld[23220:207] PONT = "Pacific/Pohnpei" = 39600 = +1100
2012-02-13 15:53:26.571 HelloWorld[23220:207] PONT = "Pacific/Ponape" = 39600 = +1100
2012-02-13 15:53:26.572 HelloWorld[23220:207] PGT = "Pacific/Port_Moresby" = 36000 = +1000
2012-02-13 15:53:26.574 HelloWorld[23220:207] CKT = "Pacific/Rarotonga" = -36000 = -1000
2012-02-13 15:53:26.575 HelloWorld[23220:207] ChST = "Pacific/Saipan" = 36000 = +1000
2012-02-13 15:53:26.576 HelloWorld[23220:207] TAHT = "Pacific/Tahiti" = -36000 = -1000
2012-02-13 15:53:26.578 HelloWorld[23220:207] GILT = "Pacific/Tarawa" = 43200 = +1200
2012-02-13 15:53:26.579 HelloWorld[23220:207] TOT = "Pacific/Tongatapu" = 46800 = +1300
2012-02-13 15:53:26.580 HelloWorld[23220:207] CHUT = "Pacific/Truk" = 36000 = +1000
2012-02-13 15:53:26.582 HelloWorld[23220:207] WAKT = "Pacific/Wake" = 43200 = +1200
2012-02-13 15:53:26.583 HelloWorld[23220:207] WFT = "Pacific/Wallis" = 43200 = +1200