There are several places on earth that have an official and unofficial time zone, chiefly on time zone borders - some places in Indiana, for example, and the fa

There are several places on earth that have an official and unofficial time zone, chiefly on time zone borders - some places in Indiana, for example, and the far western part of China where the time zone varies from solar time very significantly. In those places, if you ask a user where they are, and then show them a time zone based on that, it may not reflect what they think.