Calendar mCalendar = new GregorianCalendar();
mCalendar.setTimeZone( TimeZone.getTimeZone("Europe/Moscow"));
TimeZone mTimeZone = mCalendar.getTimeZone();
int remote_offset = mTimeZone.getRawOffset()/1000/60/60;

UTC+03:00   MSK−1: Kaliningrad Time    Europe/Kaliningrad
UTC+04:00   MSK:   Moscow Time         Europe/Moscow, Europe/Volgograd, Europe/Samara
UTC+06:00   MSK+2: Yekaterinburg Time  Asia/Yekaterinburg
UTC+07:00   MSK+3: Omsk Time           Asia/Omsk, Asia/Novosibirsk, Asia/Novokuznetsk
UTC+08:00   MSK+4: Krasnoyarsk Time    Asia/Krasnoyarsk
UTC+09:00   MSK+5: Irkutsk Time        Asia/Irkutsk
UTC+10:00   MSK+6: Yakutsk Time        Asia/Yakutsk
UTC+11:00   MSK+7: Vladivostok Time    Asia/Vladivostok, Asia/Sakhalin
UTC+12:00   MSK+8: Magadan Time        Asia/Magadan, Asia/Kamchatka, Asia/Anadyr