I posted a patch for the apparent-solar-time zones back in October and got no response. I'd like to draw attention to it again. Currently, the zones Asia/Riyadh8[789] claim to provide an offset for the present time, which is misleading. They should really be marked as disused for all times outside their one-year validity period. The attached patch makes these changes that seem like a good idea to me: * abbreviation "LAT", for "Local Apparent Time", during the period where the zone provides LAT behaviour * additional apparent-time offset entry for Dec 31 of previous year, so that the ruleset provides LAT correctly for the first half of Jan 1 * range of validity of the LAT data defined strictly as starting and ending at Jan 1 00:00 UT * zone marked as disused outside the range of validity of the LAT data -zefram