Using moment.js and jQuery to render a local date inside an element that has a UTC value in a data-date attribute

local-dates.js

// requires moment.js and jQuery

/**
 * @value A datetime string value formatted as 01/01/01 12:00:00 AM
 */
function convertDateToLocal( value ){
    return moment( value.replace(/\s(GMT|UTC)/,'') )
            .add( moment().utcOffset(),'m' )
            .format( 'MM/DD/YYYY hh:mm:ss A' );
}

/**
 * @elem An HTML element
 */
function parseDateInElement( elem ){
    var me = $( elem ),
        date = me.data('date');
    if ( date !== '' ){
        date = convertDateToLocal( date );
        if (elem.tagName.toLowerCase() === 'input')
            me.val( date );
        else
            me.html( date );
    }
}

/**
 * @elem A jQuery Object to check and parse
 * ( good for an element that is updated anytime after load - ie: Ajax call )
 */
function parseDatesInContainer( elem ){
    elem.find('[data-date]').each(function(){
        parseDateInElement( this )
    });
}

$(function(){
    $('[data-date]').each(function(){
        parseDateInElement( this )
    });
});