W13 Posted September 8, 2007 Share Posted September 8, 2007 Suggestion:Would it be possible to grab (using javascript) the current time , compare against server-time and timezone, (or just grab the timezone via javascript- if possible) and just GUESS the time-zone?So, add an <option SELECTED> next to the guessed time-zone. Link to comment Share on other sites More sharing options...
atomicknight Posted September 9, 2007 Share Posted September 9, 2007 It wouldn't be foolproof since many different timezones share the same GMT offset and you'd end up having to guess between several options (plus there are Daylight Savings issues). It may possibly be useful just as an initial suggestion to the user, but if you're going to have to choose an option anyway (in a good number of cases), why bother? Link to comment Share on other sites More sharing options...
W13 Posted October 25, 2007 Share Posted October 25, 2007 It wouldn't be foolproof since many different timezones share the same GMT offset and you'd end up having to guess between several options (plus there are Daylight Savings issues). It may possibly be useful just as an initial suggestion to the user, but if you're going to have to choose an option anyway (in a good number of cases), why bother?function getTimezoneName() { tmSummer = new Date(Date.UTC(2005, 6, 30, 0, 0, 0, 0)); so = -1 * tmSummer.getTimezoneOffset(); tmWinter = new Date(Date.UTC(2005, 12, 30, 0, 0, 0, 0)); wo = -1 * tmWinter.getTimezoneOffset(); if (-660 == so && -660 == wo) return 'Pacific/Midway'; if (-600 == so && -600 == wo) return 'Pacific/Tahiti'; if (-570 == so && -570 == wo) return 'Pacific/Marquesas'; if (-540 == so && -600 == wo) return 'America/Adak'; if (-540 == so && -540 == wo) return 'Pacific/Gambier'; if (-480 == so && -540 == wo) return 'US/Alaska'; if (-480 == so && -480 == wo) return 'Pacific/Pitcairn'; if (-420 == so && -480 == wo) return 'US/Pacific'; if (-420 == so && -420 == wo) return 'US/Arizona'; if (-360 == so && -420 == wo) return 'US/Mountain'; if (-360 == so && -360 == wo) return 'America/Guatemala'; if (-360 == so && -300 == wo) return 'Pacific/Easter'; if (-300 == so && -360 == wo) return 'US/Central'; if (-300 == so && -300 == wo) return 'America/Bogota'; if (-240 == so && -300 == wo) return 'US/Eastern'; if (-240 == so && -240 == wo) return 'America/Caracas'; if (-240 == so && -180 == wo) return 'America/Santiago'; if (-180 == so && -240 == wo) return 'Canada/Atlantic'; if (-180 == so && -180 == wo) return 'America/Montevideo'; if (-180 == so && -120 == wo) return 'America/Sao_Paulo'; if (-150 == so && -210 == wo) return 'America/St_Johns'; if (-120 == so && -180 == wo) return 'America/Godthab'; if (-120 == so && -120 == wo) return 'America/Noronha'; if (-60 == so && -60 == wo) return 'Atlantic/Cape_Verde'; if (0 == so && -60 == wo) return 'Atlantic/Azores'; if (0 == so && 0 == wo) return 'Africa/Casablanca'; if (60 == so && 0 == wo) return 'Europe/London'; if (60 == so && 60 == wo) return 'Africa/Algiers'; if (60 == so && 120 == wo) return 'Africa/Windhoek'; if (120 == so && 60 == wo) return 'Europe/Amsterdam'; if (120 == so && 120 == wo) return 'Africa/Harare'; if (180 == so && 120 == wo) return 'Europe/Athens'; if (180 == so && 180 == wo) return 'Africa/Nairobi'; if (240 == so && 180 == wo) return 'Europe/Moscow'; if (240 == so && 240 == wo) return 'Asia/Dubai'; if (270 == so && 210 == wo) return 'Asia/Tehran'; if (270 == so && 270 == wo) return 'Asia/Kabul'; if (300 == so && 240 == wo) return 'Asia/Baku'; if (300 == so && 300 == wo) return 'Asia/Karachi'; if (330 == so && 330 == wo) return 'Asia/Calcutta'; if (345 == so && 345 == wo) return 'Asia/Katmandu'; if (360 == so && 300 == wo) return 'Asia/Yekaterinburg'; if (360 == so && 360 == wo) return 'Asia/Colombo'; if (390 == so && 390 == wo) return 'Asia/Rangoon'; if (420 == so && 360 == wo) return 'Asia/Almaty'; if (420 == so && 420 == wo) return 'Asia/Bangkok'; if (480 == so && 420 == wo) return 'Asia/Krasnoyarsk'; if (480 == so && 480 == wo) return 'Australia/Perth'; if (540 == so && 480 == wo) return 'Asia/Irkutsk'; if (540 == so && 540 == wo) return 'Asia/Tokyo'; if (570 == so && 570 == wo) return 'Australia/Darwin'; if (570 == so && 630 == wo) return 'Australia/Adelaide'; if (600 == so && 540 == wo) return 'Asia/Yakutsk'; if (600 == so && 600 == wo) return 'Australia/Brisbane'; if (600 == so && 660 == wo) return 'Australia/Sydney'; if (630 == so && 660 == wo) return 'Australia/Lord_Howe'; if (660 == so && 600 == wo) return 'Asia/Vladivostok'; if (660 == so && 660 == wo) return 'Pacific/Guadalcanal'; if (690 == so && 690 == wo) return 'Pacific/Norfolk'; if (720 == so && 660 == wo) return 'Asia/Magadan'; if (720 == so && 720 == wo) return 'Pacific/Fiji'; if (720 == so && 780 == wo) return 'Pacific/Auckland'; if (765 == so && 825 == wo) return 'Pacific/Chatham'; if (780 == so && 780 == wo) return 'Pacific/Enderbury' if (840 == so && 840 == wo) return 'Pacific/Kiritimati'; return 'US/Pacific'; }and for Firefox only... timezones = { Link to comment Share on other sites More sharing options...
Louis M. Posted October 25, 2007 Share Posted October 25, 2007 Why not use IP info? Link to comment Share on other sites More sharing options...
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