date-conversion.js

// This function converts UTC date string to browser's time zone.
// and returns locale formatted date.
function toUserTimezone(utcDate){    
    timezoneOffset = new Date().getTimezoneOffset() * -1;    
    tojsDateObj = new Date(utcDate);    
    convertedDate = new Date(tojsDateObj.getTime() + (timezoneOffset * 60000));    
    return convertedDate.toLocaleString();
}

// this function coverts browser's zone specific dates to UTC timezone.
function toUTCTimezone(zoneDate){    
    timezoneOffset = new Date().getTimezoneOffset() * -1;    
    tojsDateObj = new Date(zoneDate);    
    convertedDate = new Date(tojsDateObj.getTime() - (timezoneOffset * 60000));    
    return convertedDate
}