code: function(e) {
  	
        var date = this.getValue(true);
        if (!!this.calendar) {
           
  			if(!!date) {
           	// HACK: don't fire Field updatedEvt when selecting date
           	this.ignoreBeforeShowOverlayCall = true;
           	// select the previous date in calendar
          		this.calendar.select(date);
  				this.ignoreBeforeShowOverlayCall = false;
           	this.calendar.cfg.setProperty("pagedate",(date.getMonth()+1)+"/"+date.getFullYear());
  			}
  
           this.calendar.render(); // refresh calendar
        }
     }
docs: Select the right date and display the right page on calendar, when the field has a value