@wellschmaltz "It's your actual time zone" is pushing it a bit. US timezones are East biased. For Eastern time that means the coastal Metro areas are probably pretty close to solar local time. Out west however its a different story. Seattle and Portland are closer to solar noon during daylight savings time, and even at San Francisco Longitudes Pacific time is not really that close to local solar time. It is way California has petition to go permanently to UCT-7 and if California goes Oregon and Washington are likely to follow.