I’m trying to set the trandate on an invoice that I just transformed from a sales order before I save it:

next_invoice.setValue({
                                "fieldId": 'trandate',
                                "value": moment(new Date()).format("M/D/YYYY")
                            });

But I am getting this error message: “Invalid date value (must be M/D/YYYY)” When I log out

log.debug('moment(new Date()).format("M/D/YYYY")', moment(new Date()).format("M/D/YYYY"));

I get 2/27/2019

format returns a string, you need to do .toDate(). Something like

moment(new Date()).format("M/D/YYYY").toDate()