Hi Madeleine. My Global Gazetteer product provides just this link. I am not sure if you are referring just to the USA or worldwide. If you look at the web site, there should be a paper in the download section describing how we have handled time zones. Best wishes Alan Pritchard The GLOBAL GAZETTEER: the world on file http://www.allm-geodata.com Tel: +44 (0) 1202 417 477