Date and Time Zone Examples

UErrorCode success = U_ZERO_ERROR;

UnicodeString dateReturned, curTZNameEn, curTZNameFr;

UDate curDate;

int32_t stdOffset,dstOffset;

// Create a Time Zone with America/Los_Angeles

TimeZone *tzWest = TimeZone::createTimeZone("America/Los_Angeles");

// Print out the Time Zone Name, GMT offset etc.

curTZNameEn = tzWest->getDisplayName(Locale::getEnglish(),curTZNameEn);

u_printf("%s\n","Current Time Zone Name in English:");

u_printf("%S\n", curTZNameEn.getTerminatedBuffer());

curTZNameFr = tzWest->getDisplayName(Locale::getCanadaFrench(),curTZNameFr);

u_printf("%s\n","Current Time Zone Name in French:");

u_printf("%S\n", curTZNameFr.getTerminatedBuffer());

// Create a Calendar to get current date

Calendar* calendar = Calendar::createInstance(success);

curDate = calendar->getNow();

// Print out the Current Date/Time in the given time zone

DateFormat *dt = DateFormat::createDateInstance();

dateReturned = dt->format(curDate,dateReturned,success);

u_printf("%s\n", "Current Time:");

u_printf("%S\n", dateReturned.getTerminatedBuffer());

// Use getOffset to get the stdOffset and dstOffset for the given time

tzWest->getOffset(curDate,true,stdOffset,dstOffset,success);

u_printf("%s\n%d\n","Current Time Zone STD offset:",stdOffset/(1000*60*60));

u_printf("%s\n%d\n","Current Time Zone DST offset:",dstOffset/(1000*60*60));

u_printf("%s\n", "Current date/time is in daylight savings time?");

u_printf("%s\n", (calendar->inDaylightTime(success))?"Yes":"No");

// Use createTimeZoneIDEnumeration to get the specific Time Zone IDs

// in United States with -5 hour standard offset from GMT

stdOffset = (-5)*U_MILLIS_PER_HOUR; // U_MILLIS_PER_HOUR = 60*60*1000;

StringEnumeration *ids = TimeZone::createTimeZoneIDEnumeration(UCAL_ZONE_TYPE_CANONICAL_LOCATION,"US",&stdOffset,success);

for (int i=0; i<ids->count(success);i++) {

u_printf("%s\n",ids->next(NULL,success));

}

// Use Calendar to get the hour of the day for different time zones

int32_t hour1,hour2;

TimeZone *tzEast = TimeZone::createTimeZone("America/New_York");

Calendar * cal1 = Calendar::createInstance(tzWest,success);

Calendar * cal2 = Calendar::createInstance(tzEast,success);

hour1 = cal1->get(UCAL_HOUR_OF_DAY,success);

hour2 = cal2->get(UCAL_HOUR_OF_DAY,success);

u_printf("%s\n%d\n","Current hour of the day in North American West: ", hour1);

u_printf("%s\n%d\n","Current hour of the day in North American East: ", hour2);

delete cal1;

delete cal2;

delete ids;

delete calendar;

delete dt;