This is the code I pulled together from StackOverFlow links. It writes the date to the SDE feature class in the correct format to view local time in ArcMap.
feature.attributes.sfd_edit_date = convertUTCDateToLocalDate(new Date(Date.now()));
//added to convert UTC to local Time
function convertUTCDateToLocalDate(date) {
var newDate = new Date(date.getTime()+date.getTimezoneOffset()*60*1000);
var offset = date.getTimezoneOffset() / 60;
var hours = date.getHours();
newDate.setHours(hours - offset);
newDate = newDate.getTime();
return newDate;
};