onSubmitofRecordEditForm:function(component, event, helper)
{
    var recordEditFormList = component.find("newFormtoUpdate");
    // get all fields using event.getParam("fields") and set some field values in the backend onsubmit of the recordEditForm
    var eventFields = event.getParam("fields");
    var timezone = $A.get("$Locale.timezone");
    console.log('Time Zone Preference in Salesforce ORG :'+timezone);// Result::: Time Zone Preference in Salesforce ORG :America/New_York
    var mydate = new Date().toLocaleString("en-US", {timeZone: timezone})
    console.log('Date Instance with Salesforce Locale timezone : '+mydate);// Result::: Date Instance with Salesforce Locale timezone : 1/20/2019, 11:14:03 AM
    var date = mydate.replace(/,/, '');
    var lastModifiedDate = date.replace(/:[0-9]{2}s/, ' ');
    console.log(lastModifiedDate); // Result ::: 1/20/2019 11:14 AM

    //salesforce field format is 1/20/2019 11:14 AM
    // not able to set the vale and throw error saying
   /* {"message":"Value for field 'DNC_Call_Date__c' is not in ISO 8601 format, Value: 1/20/2019 11:19 AM,
    Runtime class: java.lang.String","detail":"","output":{},"error":{"type":"TRANSPORT_ERROR","details":{}}}*/
            eventFields["DNC_Call_Date__c"] = lastModifiedDate;

            // global function submit used to submit the recordEditForm
            recordEditFormList.submit(eventFields);

    }