Check daylight savetime

daylight.md

Install

npm install moment
npm install time

Code

var nt        = require('time'),
    moment    = require('moment');

function dateDaylightUnix(datestring) {
    var date      = moment(datestring, 'DD/MM/YYYY hh:mm'),
        localtime = nt.localtime( date.toDate().getTime() / 1000);

    if ( localtime['isDaylightSavings'] == true) {
      date.subtract({ hours: 1 });
    }

    return date.unix();
}

var timestamp = dateDaylightUnix("30/03/1965 03:00");