FW: Fingerprinting timezones

John Dalziel john at computus.org
Wed Aug 10 00:41:24 UTC 2011

Hi Conrad,

The trick to getting TZ from Javascript is to unbundle it from DST first. 

As a proof of concept I wrote some code to unpack the Date class and from it 
make a rough estimate of geo-location. The code is in Actionscript but is 
commented and will work equally well for Javascript.  


best regards,
John D

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