/**
	 * Convert user time zone date to utc 
	 * @param user time zone date
	 * @return utc date
	 */
	public Date toUTC(Date date) { 
		final TimeZone localTimeZone = getUserTimeZone();
		final Calendar utcTime = Calendar.getInstance();
		utcTime.setTimeInMillis(date.getTime());
		int utcOffset = localTimeZone.getOffset(date.getTime());
		utcTime.add(Calendar.MILLISECOND, -utcOffset);
		return utcTime.getTime();
	}
	
	/**
	 * Convert utc date to user time zone date
	 * @param utc date
	 * @return user time zone date
	 */
	public Date fromUTC(Date date) {
		final TimeZone localTimeZone = getUserTimeZone();
		final Calendar localeTime = Calendar.getInstance();
		localeTime.setTimeInMillis(date.getTime());
		int utcOffset = localTimeZone.getOffset(date.getTime());
		localeTime.add(Calendar.MILLISECOND, utcOffset);
		return localeTime.getTime();
	}