remove the local timezone from a date in javascript?

Since the part you want will always has fixed length you can use:

d.toString().slice(0, 24)

jsfiddle

I believe d.toDateString() will output the format you're looking for.

var d = new Date();
d.setTime(1432851021000);
d.toDateString(); // outputs to "Thu May 28 2015"
d.toGMTString(); //outputs to "Thu, 28 May 2015 22:10:21 GMT"

Or even d.toLocaleString() "5/28/2015, 6:10:21 PM"

There are lots of methods available to Date()