bperrybap:
Really?
That wasn't the case in other APIs I've used, but if it is in this case, that is great as it makes the adjustment really simple.
Returning a UTC offset that includes the correct DST/summertime offset is a not an easy thing to do.
it is quite trivial... it is the difference between UTC and local time. The API can furnish both your local time based on the data in your call (city/zip) and UTC.
getting time zone affinities from municipalities seems sort-of mundane, particularly since generally States 1) pick one and 2) stay in it!