public without sharing class timeZonetEst {
    Public Static void Method(){
         Account acc=[select id,CreatedDate from Account limit 1];
         Datetime dTime = acc.CreatedDate;
         system.debug(dTime);
         Integer offset = UserInfo.getTimezone().getOffset(dTime);
         Datetime local = dTime.addSeconds(offset/1000);
         system.debug(local);
    }
}