void timelib_update_from_sse(timelib_time *tm)
...
			gmt_offset = timelib_get_time_zone_info(tm->sse, tm->tz_info);
			timelib_unixtime2gmt(tm, tm->sse + gmt_offset->offset);
			timelib_time_offset_dtor(gmt_offset);

static void do_adjust_timezone(timelib_time *tz, timelib_tzinfo *tzi)
...
			current = timelib_get_time_zone_info(tz->sse, tzi);
			after = timelib_get_time_zone_info(tz->sse - current->offset, tzi);
			tz->is_localtime = 1;

			in_transition = (
				((tz->sse - after->offset) >= (after->transition_time + (current->offset - after->offset))) &&
				((tz->sse - after->offset) < after->transition_time)
			);

			if ((current->offset != after->offset) && !in_transition) {
				adjustment = -after->offset;
			} else {
				adjustment = -current->offset;
			}
			timelib_time_offset_dtor(current);
			timelib_time_offset_dtor(after);

Seconds TimeZone::utcOffset(Date_t date) const {
    if (isTimeZoneIDZone()) {
        auto* offset = timelib_get_time_zone_info(
            durationCount<Seconds>(date.toDurationSinceEpoch()), _tzInfo.get());
        auto timezoneOffsetFromUTC = Seconds(offset->offset);
        timelib_time_offset_dtor(offset);