Automatic Timezone Detection Using JavaScript.
http://pellepim.bitbucket.org/jstz/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 635,663 websites that are jsTimezoneDetect Customers. We know of 157,981 live websites using jsTimezoneDetect and an additional 477,682 sites that used jsTimezoneDetect historically and 63,722 websites in the United States.
Get a list of 635,663 websites using jsTimezoneDetect which includes location information, hosting data, contact details, 157,981 currently live websites and an additional 296,401 domains that redirect to sites in this list. 477,682 sites that used this technology previously and 63,722 websites in the United States currently using jsTimezoneDetect.