http://forum.geonames.org/gforum/posts/list/4.page JForum - http://www.jforum.net http://forum.geonames.org/gforum/posts/list/1853.page#7560 http://forum.geonames.org/gforum/posts/list/1853.page#7560 GMT http://forum.geonames.org/gforum/posts/list/1853.page#7571 http://forum.geonames.org/gforum/posts/list/1853.page#7571 GMT http://forum.geonames.org/gforum/posts/list/1853.page#7576 http://forum.geonames.org/gforum/posts/list/1853.page#7576 GMT http://forum.geonames.org/gforum/posts/list/1853.page#7597 http://forum.geonames.org/gforum/posts/list/1853.page#7597 GMT http://upload.wikimedia.org/wikipedia/commons/9/93/Navajo-Nation-Map-PHS.jpg It looks like 10 miles is about right. Is there any documentation anywhere that talks more about how the timezone service works? I'd be interested to know how the regions are defined and what sort of accuracy can generally be expected. Best, Stephen]]> http://forum.geonames.org/gforum/posts/list/1853.page#7599 http://forum.geonames.org/gforum/posts/list/1853.page#7599 GMT