momentjs - Moment js not working as expected -

i have date object:

sun apr 20 2014 11:48:33 gmt-0400 (edt) 

i want able render 3 letter month , date, such "apr 20"

i trying use moment.js accomplish task, so:

moment(date_var).format('mmm d'); 

which spits out: "jun 25" instead of expected "apr 20".

running:

json.stringify(date_var) 

produces:

2014-04-20t15:48:33.000z 

thanks

demo: http://jsfiddle.net/nfmns/3/

html:

<strong>javascript </strong><span></span> <br/> <strong>moment </strong> <p></p> 

code:

$(function(){ var day = new date(2014, 4, 20,11,48,33); moment().format(); var mome=moment(day); $('span').text(day); $('p').text(mome.format("mmm d")); });