const {TimezoneNames, metazones} = require('timezone-locale');

// files are required separately to avoid bloat
const germanDisplay = require('timezone-locale/data/de_DE-display.json');
const germanCldr = require('timezone-locale/data/de-cldr.json');
const englishDisplay = require('timezone-locale/data/en_US-display.json');
const englishCldr = require('timezone-locale/data/en-cldr.json');

const timezoneNames = new TimezoneNames({
    display: {
        de_DE: germanDisplay,
        en_US: englishDisplay
    },
    cldr: {
        de: germanCldr,
        en: englishCldr
    }
}, metazones);

console.log(timezoneNames.get('Europe/Berlin', 'en_US'));
// {
//     generic: 'Central European Time',
//     standard: 'Central European Standard Time',
//     daylight: 'Central European Summer Time'
// }

console.log(timezoneNames.get('Europe/Berlin', 'de_DE'));
// {
//    generic: 'Mitteleuropäische Zeit',
//    standard: 'Mitteleuropäische Normalzeit',
//    daylight: 'Mitteleuropäische Sommerzeit'
// }