I think you are aware now that it is a timezone issue, but I figured I'll supply you a helper class that I wrote and use in most my applications as client server applications always have to take in account timezones and should be storing GMT on the server.
Hope this helps, you can copy and paste this class and handle a lot of your date formatting and timezone issues to and from the server.
public class DateHelper {
/*///////////////////////////////////////////////////////////////
// MEMBERS
*////////////////////////////////////////////////////////////////
public static SimpleDateFormat MY_APPS_CUSTOM_FORMATTER;
public final static String MMMM_dd = "MMMM, dd";
public final static String MMM_dd_yyyy = "MMM dd yyyy";
public final static String MMSlashddSlashyy = "MM/dd/yy";
public final static String MMSlashddSlashyy_hhColonmm_a = "MM/dd/yy hh:mm a";
public final static Calendar mCalender = Calendar.getInstance();
public final static TimeZone mLocalTimezone = mCalender.getTimeZone();
/*///////////////////////////////////////////////////////////////
// PROPERTIES
*////////////////////////////////////////////////////////////////
public synchronized static SimpleDateFormat getMyAppsDateCustomFormatter(boolean toServer, String format){
MY_APPS_CUSTOM_FORMATTER = new SimpleDateFormat(format);
if(toServer){
MY_APPS_CUSTOM_FORMATTER.setTimeZone(TimeZone.getTimeZone("UTC"));
}else{
MY_APPS_CUSTOM_FORMATTER.setTimeZone(mLocalTimezone);
}
return MY_APPS_CUSTOM_FORMATTER;
}
/*///////////////////////////////////////////////////////////////
// EXTRA HELPER METHODS
*////////////////////////////////////////////////////////////////
public static String getNowLocalTime(String formatToReturn){
return getMyAppsDateCustomFormatter(false, formatToReturn).format(new Date());
}
/*///////////////////////////////////////////////////////////////
// FROM SERVER FORMATTING
*////////////////////////////////////////////////////////////////
public static String getLocalDateStringFromGMTLong(long gmtTimestamp, String formatToReturn){
return getMyAppsDateCustomFormatter(false, formatToReturn).format(new Date(gmtTimestamp * 1000));
}
public static Date getDateFromLocalFormattedString(String date, String formatToUse, boolean toServer) throws Exception{
Date parsedDate = null;
try {
parsedDate = getMyAppsDateCustomFormatter(toServer, formatToUse).parse(date);
} catch (ParseException e) { //developer error, do NOT localize
throw new Exception(Globals.DEV_ERROR_STRINGS.INVALID_DATE_SUPPLIED_FOR_DEFAULT_FORMATTER);
}
return parsedDate;
}
public static String getFormattedStringFromLocalDate(Date date, String formatToUse) throws Exception{
return getMyAppsDateCustomFormatter(false, formatToUse).format(date);
}
/*///////////////////////////////////////////////////////////////
// TO SERVER FORMATTING
*////////////////////////////////////////////////////////////////
public static long getGMTLongFromLocalDate(Date date){
//Get Local Timezone
TimeZone tz = TimeZone.getDefault();
//Create new date for offset to GMT
Date ret = new Date(date.getTime() - tz.getRawOffset() );
// if we are now in DST, back off by the delta. Note that we are checking the GMT date, this is the KEY.
if ( tz.inDaylightTime( ret )){
Date dstDate = new Date( ret.getTime() - tz.getDSTSavings() );
// check to make sure we have not crossed back into standard time
// this happens when we are on the cusp of DST (7pm the day before the change for PDT)
if ( tz.inDaylightTime( dstDate )){
ret = dstDate;
}
}
return ret.getTime();
}
public static long getGMTLongFromLocalDateString(String date, String formatUsed) throws Exception {
Date passedDate = getDateFromLocalFormattedString(date, formatUsed, true);
//Get Local Timezone
TimeZone tz = TimeZone.getDefault();
//Create new date for offset to GMT
Date ret = new Date(passedDate.getTime() - tz.getRawOffset() );
// if we are now in DST, back off by the delta. Note that we are checking the GMT date, this is the KEY.
if ( tz.inDaylightTime( ret )){
Date dstDate = new Date( ret.getTime() - tz.getDSTSavings() );
// check to make sure we have not crossed back into standard time
// this happens when we are on the cusp of DST (7pm the day before the change for PDT)
if ( tz.inDaylightTime( dstDate )){
ret = dstDate;
}
}
return ret.getTime() / 1000;
}
public static long getNowGMTTime(){
return getGMTLongFromLocalDate(new Date());
}
}
