Paul Eggert said:
However, the upper horizontal line on that diagram roughly follows the Great Caucasus Mountains, which makes a reasonable boundary. The key question here is what continent Tbilisi is in, since that's the data point that the tz database uses.
Right. The GCM run along the border, as far as I can tell, putting all of Georgia in Asia.
Modern sources typically give either the crest of the Caucasus, or the Kuma-Manych Depression (which separates the Russian Plain from the North Caucasus), as the boundary between Europe and Asia in that region. This would put Tbilisi in Asia.
For ancient sources the story is more interesting. [...] To summarize the last few paragraphs: all the ancient sources I've found agree that Tbilisi itself is in Asia.
Interesting. Thanks. -- Clive D.W. Feather | Work: <clive@demon.net> | Tel: +44 20 8495 6138 Internet Expert | Home: <clive@davros.org> | Fax: +44 870 051 9937 Demon Internet | WWW: http://www.davros.org | Mobile: +44 7973 377646 Thus plc | |