How to check my device time is in which timezone? - ios

Question

I am getting timeStamp from API as EST, if my device is in India or in USA then it should show (IST or CST) the time according to the timezone. How can I do it?
let currentTimeZone = formatter.timeZone.identifier
print(currentTimeZone) // Asia/Kolkata
How can I get EST, CST, EDT, etc. instead of getting Asia/Kolkata?

Answer 1

You can get the name from the name property:
NSLog(#"Name : %#", timeZone.name);
Output will be :
2015-07-10 13:31:46.292 APP[2904:50429] Name : Asia/Calcutta
Then You can to get the name with the desired style:
NSTimeZone* timeZone = [NSTimeZone timeZoneWithAbbreviation:#"IST"];
NSString* timeZoneName = [timeZone localizedName:NSTimeZoneNameStyleStandard locale:[NSLocale currentLocale]];
NSLog(#"Name : %#", timeZoneName);
NSLog(#"%#",[NSTimeZone abbreviationDictionary]);
output will be:
2015-07-10 11:44:05.954 APP[1472:26120] {
ADT = "America/Halifax";
AKDT = "America/Juneau";
AKST = "America/Juneau";
ART = "America/Argentina/Buenos_Aires";
AST = "America/Halifax";
BDT = "Asia/Dhaka";
BRST = "America/Sao_Paulo";
BRT = "America/Sao_Paulo";
BST = "Europe/London";
CAT = "Africa/Harare";
CDT = "America/Chicago";
CEST = "Europe/Paris";
CET = "Europe/Paris";
CLST = "America/Santiago";
CLT = "America/Santiago";
COT = "America/Bogota";
CST = "America/Chicago";
EAT = "Africa/Addis_Ababa";
EDT = "America/New_York";
EEST = "Europe/Istanbul";
EET = "Europe/Istanbul";
EST = "America/New_York";
GMT = GMT;
GST = "Asia/Dubai";
HKT = "Asia/Hong_Kong";
HST = "Pacific/Honolulu";
ICT = "Asia/Bangkok";
IRST = "Asia/Tehran";
IST = "Asia/Calcutta";
JST = "Asia/Tokyo";
KST = "Asia/Seoul";
MDT = "America/Denver";
MSD = "Europe/Moscow";
MSK = "Europe/Moscow";
MST = "America/Denver";
NZDT = "Pacific/Auckland";
NZST = "Pacific/Auckland";
PDT = "America/Los_Angeles";
PET = "America/Lima";
PHT = "Asia/Manila";
PKT = "Asia/Karachi";
PST = "America/Los_Angeles";
SGT = "Asia/Singapore";
UTC = UTC;
WAT = "Africa/Lagos";
WEST = "Europe/Lisbon";
WET = "Europe/Lisbon";
WIT = "Asia/Jakarta";
}
then you can find what is your current timezone.

Answer 2

let timeStr = "15/02/2014 01:00:00"
let currentTimezone = TimeZone.current
let targetTimezone = TimeZone(abbreviation: "EST") ?? TimeZone.current
let dateFormatter1 = DateFormatter()
dateFormatter1.dateFormat = "dd/MM/yyyy HH:mm:ss"
let localOffset = currentTimezone.secondsFromGMT()
let targetOffset = targetTimezone.secondsFromGMT()
let localDate = dateFormatter1.date(from: timeStr)
let targetDate = localDate?.addingTimeInterval(TimeInterval(targetOffset - localOffset))
Try this. TimeZone.current will return you the current timezone used by system.

Answer 3

try this code:
let timeZone = TimeZone.current
let name = timeZone.localizedName(for: .shortStandard, locale: Locale.current)
print("Name :: ", name)

Answer 4

Please try this.It works for me.
Please get the time from server from UTC format.
then :
func convertFromUTCtoLocal(dateToConvert:String) -> String {
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssz"
let convertedDate = formatter.date(from: dateToConvert)
formatter.timeZone = TimeZone(abbreviation: "EST")
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
return formatter.string(from: convertedDate!)
}
Set the timezone according to your requirement.It may helps to you. Thank you

Answer 5

ObjC:
NSTimeZone *timeZoneLocal = [NSTimeZone localTimeZone];
NSString *strTimeZoneAbb = [timeZoneLocal abbreviation];
NSString *strTimeZoneName = [timeZoneLocal name];
NSLog(#"%#",strTimeZoneAbb); //Ex:Output:GMT +5:10
NSLog(#"%#",strTimeZoneName); //Ex:Output:Asia/Calcutta
Swift:
let timezone = NSTimeZone.local
print(timezone.abbreviation)
print(timezone.name)