While the Maemo time zones are abridged and don't reflect the full set of IANA data, they still are a IANA excerpt, and not some invention of Nokia. And the cities of the IANA timezone names are not arbitrary home towns, but the time zone reference location. As IANA time zones attempt to cover all known historical defined time zones (i.e. anything past local solar time) there are many more locations in the IANA database than current time zones, and the US in particular, where individual counties and even towns have been and still are very inventive regarding their local time, accounts for quite a mess.

But you cannot simply add any place in there, or you will fail whenever externally referencing dates and times - whatever belongs there has to be registered with the IANA first, and for that, it must have had a individual time zone at least at some time in the past. Adding Indianapolis would be ok, being a IANA location, and Indiana counties, being one of the worlds worst sets of time zone offenders, account for a dozen or two different timezones, but Anderson in particular never had its own time...