Hi Chandresh,

I am not sure what is the purpose of these codes, when you are doing the same thing is datetime vaiable

var dateArr = str.split(' ');

var date = dateArr[0];

var time= dateArr[1];

var datetime= date+' '+time;

Can you just try this and check if it helps.

var gr=new GlideRecord("sn_customerservice_case_staging");

gr.addQuery('u_case','f4235c63db87b6003f7d388ffe961965');          

gr.query();

while(gr.next()){

var str= gr.u_time_stamp;    

//var gdt = new GlideDateTime(str);                                            

var tz = gs.getSession().getTimeZone();                                                                                                

gs.print(str.setTZ(tz));                                                                                    

}

setTZ(tz) : http://wiki.servicenow.com/index.php?title=GlideDateTime#setTZ.28tz.29

Sets the time zone of the GlideDateTime object to be the specified time zone.

Also, just to trouble the issue please check if it works.

var tz = gs.getSession().getTimeZone();

var gdt = new GlideDateTime();

gdt.setTZ(tz)