Get PHP Timezone Name from Latitude and Longitude? [duplicate]

For those who wants to get timezone from country code, latitude and longitude. ( easy to get it if you have a geoip module installed on your server )

Try this, I've added a distance calculation - only for those countries which has multiple timezones.Ah, and the country code is a two letter ISO code.

// ben@jpfunction get_nearest_timezone($cur_lat, $cur_long, $country_code = '') {    $timezone_ids = ($country_code) ? DateTimeZone::listIdentifiers(DateTimeZone::PER_COUNTRY, $country_code)                                    : DateTimeZone::listIdentifiers();    if($timezone_ids && is_array($timezone_ids) && isset($timezone_ids[0])) {        $time_zone = '';        $tz_distance = 0;        //only one identifier?        if (count($timezone_ids) == 1) {            $time_zone = $timezone_ids[0];        } else {            foreach($timezone_ids as $timezone_id) {                $timezone = new DateTimeZone($timezone_id);                $location = $timezone->getLocation();                $tz_lat   = $location['latitude'];                $tz_long  = $location['longitude'];                $theta    = $cur_long - $tz_long;                $distance = (sin(deg2rad($cur_lat)) * sin(deg2rad($tz_lat)))                 + (cos(deg2rad($cur_lat)) * cos(deg2rad($tz_lat)) * cos(deg2rad($theta)));                $distance = acos($distance);                $distance = abs(rad2deg($distance));                // echo '<br />'.$timezone_id.' '.$distance;                 if (!$time_zone || $tz_distance > $distance) {                    $time_zone   = $timezone_id;                    $tz_distance = $distance;                }             }        }        return  $time_zone;    }    return 'unknown';}//timezone for one NY co-ordinateecho get_nearest_timezone(40.772222,-74.164581) ;// more faster and accurate if you can pass the country code echo get_nearest_timezone(40.772222, -74.164581, 'US') ;

Geonames should do the job nicely:

http://www.geonames.org/

They've also got a php library.

A good resource is the Google Time Zone API.

Documentation: https://developers.google.com/maps/documentation/timezone/

It takes latitude and longitude and returns array like this:

array(    'dstOffset' => (int) 3600,    'rawOffset' => (int) -18000,    'status' => 'OK',    'timeZoneId' => 'America/New_York',    'timeZoneName' => 'Eastern Daylight Time')

...but there are some limits:

[updated 2019] The Google Time Zone API has usage limits in place. Basically, billing must be enabled on your project, but a $200 USD "Google Maps Platform credit" is applied each month (so in most cases your first 40,000 Time Zone API calls/month would be free of charge).

• Full details here and here.