Convert java.util.Date time zone between UTC and Turkish time zones.

DateTimeZoneConvertionUtils.java

    private static final ZoneId TURKEY_ZONE_ID = ZoneId.of("Turkey");
    private static final ZoneId UTC_ZONE_ID = ZoneId.of("UTC");

    public static Date convertTurkeyToUTC(Date date) {
        return Date.from(date.toInstant().atZone(UTC_ZONE_ID).toLocalDateTime().atZone(TURKEY_ZONE_ID).toInstant());
    }

    public static Date convertUTCToTurkey(Date date) {
        return Date.from(date.toInstant().atZone(TURKEY_ZONE_ID).toLocalDateTime().atZone(UTC_ZONE_ID).toInstant());
    }

It seems a little bit complex but works like a charm when needed to convert java.util.Date time zone value between UTC and Turkish time zones. I know it is not a best practice to use java.util.Date but you need it with hibernate and when writing unit/integration tests.