DealHelper.java

	private Date adjustDateTimezone(final Date rawDate, final TimeZone tz) {

		// the 'rawDate' was passed by the API as a 'local' date,
		// and this date has been parsed as if it were in UTC, so it needs to be
		// adjusted
		// to the 'local' time indicated by the TimeZone param.

		// get the 'raw' GMT-offset for the timezone (not accounting for DST)
		final Long tzOffset = (tz.getRawOffset() * -1L);
		int dstOffset;

		// account for DST if it is in effect for this date
		if (tz.inDaylightTime(rawDate)) {

			dstOffset = tz.getDSTSavings();
			if (tzOffset < 0) {
				dstOffset = dstOffset * -1;
			}
		} else {
			dstOffset = 0;
		}

		// adjust the UTC date back to 'local' time, including DST offset
		final Date adjustedDate = new Date(rawDate.getTime()
				+ (tzOffset + dstOffset));

		return adjustedDate;
	}

	private void adjustDealTimezone(final DealInstance deal, final TimeZone tz) {

		// Adjust and update the deal-dates

		deal.setPublished_at(adjustDateTimezone(deal.getPublished_at(), tz));
		deal.setStarts_at(adjustDateTimezone(deal.getStarts_at(), tz));
		deal.setEnds_at(adjustDateTimezone(deal.getEnds_at(), tz));
	}

	private void adjustDealsTimezone(final List<DealInstance> deals,
			final TimeZone tz) {

		// adjust the dates for all deals in the list
		for (final DealInstance deal : deals) {
			adjustDealTimezone(deal, tz);
		}
	}