The package is used to look for timezone based on airport IATA codes.
npm install --save airport-tz
var airport_tz = require('airport-tz');
var IATA = 'NYC';
var timezone_obj = airport_tz.findWhere({ iata: IATA });
console.log('Searching timezone for: ' + IATA); //Searching timezone for: NYC
console.log('Timezone: ' + timezone_obj.get('timezone')); // Timezone: America/New_York
console.log('GMT: ' + timezone_obj.utcOffset()); //GMT: -5