Invalid date when the date from rest API is retrieved - ionic-framework

Question

I have retrieved the date from Rest API. The outcome becomes invalid date. Below is my code. Could you please help me if there is wrong format?
ngOnInit() {
this.reportList$ = [];
from(this.mcsService.getReportList().then(res => {
for (let item of res.data.items as ReportSummaryItem[]) {
let itemDate = new Date(item.createdOn);
item.createdOn = itemDate.toLocaleDateString('en-GB') + ' ' + itemDate.toLocaleTimeString();
console.log("Report Created Date"+item.createdOn);
this.reportList$.push(item);
}
this.ref.detectChanges();
return res.data.items;
}));
}
Here is function from Rest API where the date is retrieved.
function getRows(req, res) {
var parameter = { 'createdBy': req.user.username };
var limitParam = '';
var offsetParam = '';
if (typeof req.query.offset === 'undefined') {
offsetParam = ' OFFSET 0 ';
} else {
offsetParam = ' OFFSET ' + req.query.offset;
}
if (typeof req.query.limit === 'undefined') {
limitParam = ' ROWS FETCH NEXT 100 ROWS ONLY ';
} else {
limitParam = ' ROWS FETCH NEXT ' + req.query.limit + ' ROWS ONLY ';
}
req.oracleMobile.database.sql(
'SELECT tr."id", tr."observation", '
+ 'TO_CHAR(tr."createdOn" AT TIME ZONE \'+00:00\', \'dd-MON-yy\') as "createdOn" '
+ 'FROM "' + req.tarTable + '" tr ' +
' WHERE tr."createdBy" = :createdBy ' +
' ORDER BY tr."createdOn" desc ' + offsetParam + limitParam, parameter
).then(
function (result) {
res.status(result.statusCode).send(result.result);
}, function (err) {
res.status(err.statusCode).send(errorHandler.restErrorHandler(err));
}
);
}

Answer 1

I think the format of the date returned is not compatible. It's better to format it following ISO 8601 (yyyy-mm-ddThh:mm:ss.ffffff).
Change your SQL to:
+ 'TO_CHAR(tr."createdOn" AT TIME ZONE \'+00:00:00\', \'yyyy-MON-dd\') as "createdOn" '
... or something like that (not sure about the syntax as I'm not using oracleMobile database.