in api/Serialization.ts [300:310]
function _getTranslatedDateValue(valueToConvert: any, serialize: boolean): any {
if (!serialize && typeof valueToConvert === "string") {
// Deserialize: String --> Date
var dateValue = new Date(valueToConvert);
if (isNaN(<any>dateValue) && navigator.userAgent && /msie/i.test(navigator.userAgent)) {
dateValue = _convertLegacyIEDate(valueToConvert);
}
return dateValue;
}
return valueToConvert;
}