This class represents a time zone—objects that store information about a geographic time zone, such as the name, abbreviation, time from GMT, whether or not daylight savings is in effect, and so on.

NSTimeZone is toll-free bridged with the Core Foundation type CFTimeZone. As such, NSTimeZone objects can be used interchangeably with the CFTimeZone pointer type, CFTimeZoneRef.

@interface NSTimeZone : NSObject <NSCoding, NSCopying>
// Initializers
- (id)initWithName:(NSString *)tzName;
- (id)initWithName:(NSString *)tzName data:(NSData *)aData;
// Class Methods
+ (NSDictionary *)abbreviationDictionary;
+ (NSTimeZone *)defaultTimeZone;
+ (NSArray *)knownTimeZoneNames;
+ (NSTimeZone *)localTimeZone;
+ (void)resetSystemTimeZone;
+ (void)setDefaultTimeZone:(NSTimeZone *)aTimeZone;
+ (NSTimeZone *)systemTimeZone;
+ (id)timeZoneForSecondsFromGMT:(int)seconds;
+ (id)timeZoneWithAbbreviation:(NSString *)abbreviation;
+ (id)timeZoneWithName:(NSString *)tzName;
+ (id)timeZoneWithName:(NSString *)tzName data:(NSData *)aData;
// Instance Methods
- (NSString *)abbreviation;
- (NSString *)abbreviationForDate:(NSDate *)aDate;
- (NSData *)data;
- (NSString *)description;
- (BOOL)isDaylightSavingTime;
- (BOOL)isDaylightSavingTimeForDate:(NSDate *)aDate;
- (BOOL)isEqualToTimeZone:(NSTimeZone *)aTimeZone;
- (NSString *)name;
- (int)secondsFromGMT;
- (int)secondsFromGMTForDate:(NSDate *)aDate;
// Methods Implementing NSCoding
- (void)encodeWithCoder:(NSCoder *)aCoder;
- (id)initWithCoder:(NSCoder *)aDecoder;
// Methods Implementing NSCopying
- (id)copyWithZone:(NSZone *)zone;