Automatic Timezone Detection Using JavaScript.
http://pellepim.bitbucket.org/jstz/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 486,227 websites that are jsTimezoneDetect Customers. We know of 270,120 live websites using jsTimezoneDetect and an additional 216,107 sites that used jsTimezoneDetect historically and 95,193 websites in the United States.
Get a list of 486,227 websites using jsTimezoneDetect which includes location information, hosting data, contact details, 270,120 currently live websites and an additional 262,275 domains that redirect to sites in this list. 216,107 sites that used this technology previously and 95,193 websites in the United States currently using jsTimezoneDetect.