nothing changed. but now i see the HAVEDATA notification again. could it be, that the Dom-update (from notification) not really goes ?
i mean i saw in the dev, that the birthday-data are right. it was the first entry of this data-string (or jsonObj) …
only the header i can see …

error => now.getYear() is not a function

before looking in dev: i saw the following:

var birth_date_moment = moment(birth_date + now.getYear(),"DD.MMYYYY");

change to DD.MM.YYYY (point between MM and YYYY) ?

only the header i see, BUT now i see the terminal-message “HAVEDATA” but an error, too:

ok, nothing changed and i don’t see any messages of “HAVEDATA” (changed it in both files to big letter without space). i only see the header “Geburtstage” … :-(
node_helper.js:

var NodeHelper = require("node_helper");
var moment = require("moment");

// add require of other javascripot components here
// var xxx = require('yyy'); here
const csv = require("csvtojson");
var birthdaysArray = [];

module.exports = NodeHelper.create({
/*
	init(){
		console.log("init module helper perlchamp");
	},
*/
	start() {

	},
/*	
	stop(){
		console.log("Stopping module helper: " + this.name);
	},
*/
	// handle messages from our module// each notification indicates a different messages
	// payload is a data structure that is different per message.. up to you to design this
	socketNotificationReceived(notification, payload) {				

		var self = this;
		console.log("Starting module helper: " + this.name);

		// convert the csv-file into a JSON-String
		const csvFilePath = this.path + '/data/birthdays.csv';
		csv()
		.fromFile(csvFilePath)
		.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			
			// send data to [modulname].js
			self.sendSocketNotification("HAVEDATA", jsonObj);
		})		

		// if config message from module
		if (notification === "CONFIG") {
			// save payload config info
			this.config = payload;
			// wait 15 seconds, send a message back to module
			setTimeout(()=> {this.sendSocketNotification("message_from_helper"," this is a test_message")}, 15000);
		}
		else if(notification === "????2") {
	
		}
	},
});

maye change this part, cause i never need this variable birthdaysArray:

.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);

perlchamp.js:

Module.register("perlchamp", {

	defaults: {
		language: "de",
		dimmEntries: true   // true: dims entries and the associated 
							//       symbol when the date has expired.
							// false: delete entries and the associated 
							//        symbol when the date has expired.
	},
	
	active_birthdays: {
		
	},


	init: function(){
		Log.log(this.name + " is in init!");
	},

	start: function(){
		Log.log("Starting module: " + this.name);

		// Set locale
		moment.locale(config.language);
	},

	loaded: function(callback) {
		Log.log(this.name + " is loaded!");
		callback();
	},

	// return list of other functional scripts to use, if any (like require in node_helper)
	getScripts: function() {
		return	["moment.js"];
	}, 

	// return list of stylesheet files to use if any
	getStyles: function() {
		return 	[this.data.path + "/css/perlchamp.css"];
	},


	// only called if the module header was configured in module config in config.js
	getHeader: function() {
		return this.data.header;
	},

	// messages received from other modules and the system (NOT from your node helper)
	// payload is a notification dependent data structure
	notificationReceived: function(notification, payload, sender) {
		// once everybody is loaded up
		if(notification==="ALL_MODULES_STARTED"){
			// send our config to our node_helper
			this.sendSocketNotification("CONFIG",this.config);
		}
		if (sender) {
			Log.log(this.name + " received a module notification: " + notification + " from sender: " + sender.name);
		} else {
			Log.log(this.name + " received a system notification: " + notification);
		}
	},
	
	// messages received from from your node helper (NOT other modules or the system)
	// payload is a notification dependent data structure, up to you to design between module and node_helper
	socketNotificationReceived: function(notification, payload) {

		if(notification === "HAVEDATE"){
			Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
			
			var now = moment();
			for(var birthday of payload) {
				// get 1st 5 chars of birthdate, thru month
				// we will use this as the key in the hash
				var birth_date = birthday.birth.substring(0,4);
				
				// get the birthday as a moment in this year, for comparing
				var birth_date_moment = moment(birth_date + now.getYear(),"DD.MMYYYY");

				// u can add days to a moment object and then compare 
				//     if the birthdate is before that date (and after now)
				//     so within the next xx days

				// if the date is the same or later, don't use time of day
				if(birth_date.startOf('day').isSame(now.startOf('day'))) {

					// birthday is in this month
					// check the hash if we've seen anything for today yet
					// if we haven't see this date yet
					if(this.active_birthdays[birth_date] == undefined){
           
						//  create the holder for its info (array of 
						//		names) in the hash
						this.active_birthdays[birth_date] = [];
					}
					// save the persons name on the list
					this.active_birthdays[birth_date].push(birthday.name);
				}
			}
     
			// tell MM to call and get our content
			self.updateDom();
		}     			
	},

	// system notification your module is being hidden
	// typically you would stop doing UI updates (getDom/updateDom) if the module is hidden
	suspend: function(){

	},

	// system notification your module is being unhidden/shown
	// typically you would resume doing UI updates (getDom/updateDom) if the module is shown
	resume: function(){

	},

	// this is the major worker of the module, it provides the displayable content for this module
	getDom: function() {
		var wrapper = document.createElement("div");

		for(var birthday of Object.keys(this.active_birthdays)){
			for(var name of this.active_birthdays[birthday]){
				var m = document.createElement('div');
				m.innerText = birthday + ' '+ name;
				wrapper.appendChild(m);
			}
		}

		// pass the created content back to MM to add to DOM.
		return wrapper;
	}
})

please have an eye on the getDom-sektion.

ok, be carefully. keep corona away. use mouth and nose protection and wear disposable gloves !

thanks, but doesn’t work. it seems, that i’m too stupid for this ?
modified perlchamp.js:

Module.register("perlchamp", {

	defaults: {
		language: "de",
		dimmEntries: true   // true: dims entries and the associated 
							//       symbol when the date has expired.
							// false: delete entries and the associated 
							//        symbol when the date has expired.
	},
	
	active_birthdays: {
		
	},


	init: function(){
		Log.log(this.name + " is in init!");
	},

	start: function(){
		Log.log("Starting module: " + this.name);

		// Set locale
		moment.locale(config.language);
	},

	loaded: function(callback) {
		Log.log(this.name + " is loaded!");
		callback();
	},

	// return list of other functional scripts to use, if any (like require in node_helper)
	getScripts: function() {
		return	["moment.js"];
	}, 

	// return list of stylesheet files to use if any
	getStyles: function() {
		return 	[this.data.path + "/css/perlchamp.css"];
	},


	// only called if the module header was configured in module config in config.js
	getHeader: function() {
		return this.data.header;
	},

	// messages received from other modules and the system (NOT from your node helper)
	// payload is a notification dependent data structure
	notificationReceived: function(notification, payload, sender) {
		// once everybody is loaded up
		if(notification==="ALL_MODULES_STARTED"){
			// send our config to our node_helper
			this.sendSocketNotification("CONFIG",this.config);
		}
		if (sender) {
			Log.log(this.name + " received a module notification: " + notification + " from sender: " + sender.name);
		} else {
			Log.log(this.name + " received a system notification: " + notification);
		}
	},
	
	// messages received from from your node helper (NOT other modules or the system)
	// payload is a notification dependent data structure, up to you to design between module and node_helper
	socketNotificationReceived: function(notification, payload) {

		if(notification === "have data"){
			Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
			
			var now = moment();
			for(var birthday of payload) {
				// get 1st 5 chars of birthdate, thru month
				// we will use this as the key in the hash
				var birth_date = birthday.birth.substring(0,4);
				
				// get the birthday as a moment in this year, for comparing
				var birth_date_moment = moment(birth_date + now.getYear(),"DD.MMYYYY");

				// u can add days to a moment object and then compare 
				//     if the birthdate is before that date (and after now)
				//     so within the next xx days

				// if the date is the same or later, don't use time of day
				if(birth_date.startOf('day').isSame(now.startOf('day'))) {

					// birthday is in this month
					// check the hash if we've seen anything for today yet
					// if we haven't see this date yet
					if(this.active_birthdays[birth_date] == undefined){
           
						//  create the holder for its info (array of 
						//		names) in the hash
						this.active_birthdays[birth_date] = [];
					}
					// save the persons name on the list
					this.active_birthdays[birth_date].push(birthday.name);
				}
			}
     
			// tell MM to call and get our content
			self.updateDom();
		}     			
	},

	// system notification your module is being hidden
	// typically you would stop doing UI updates (getDom/updateDom) if the module is hidden
	suspend: function(){

	},

	// system notification your module is being unhidden/shown
	// typically you would resume doing UI updates (getDom/updateDom) if the module is shown
	resume: function(){

	},

	// this is the major worker of the module, it provides the displayable content for this module
	getDom: function() {
		var wrapper = document.createElement("div");

		for(var birthday of Object.keys(this.active_birthdays)){
			for(var name of this.active_birthdays[birthday]){
				var m = document.createElement('div');
				m.innerText = birthday + ' '+ name;
				wrapper.appendChild(m);
			}
		}

		// pass the created content back to MM to add to DOM.
		return wrapper;
	}
})

in node_helper.js was nothing to be changed. maybe I put a few semicolons where none have to go?

this is the getDom-section where the data finally should be placed (perlchamp is for testing) :

    getDom: function() {


	if ((moment() > this.midnight) || (!this.loaded)) {
	    var month = moment().month();
	    var year = moment().year();
	    var monthName = moment().format("MMMM");
	    var monthLength = moment().daysInMonth();

	    // tabelle erstellen
	    var wrapper = document.createElement("table");
	    wrapper.className = 'table';
	    wrapper.id = 'birthday-table';

	    // tabellenkopf erstellen
	    var tHeader = document.createElement("thead");
	    tHeader.className = "thead";
	    tHeader.id = "birthday-thead";

	    var headerTR = document.createElement("tr");
	    headerTR.className = "tr-head";
	    headerTR.id = "birthday-tr-head";			    

	    var headerTH = document.createElement("th");
	    headerTH.colSpan = "2";
	    headerTH.scope = "col";
	    headerTH.className = "th-head";
	    headerTH.id = "birthday-th-head";
	    headerTH.innerHTML = this.translate(this.config.title);
	    headerTR.appendChild(headerTH);
	    			
	    tHeader.appendChild(headerTR);
	    wrapper.appendChild(tHeader);
		    
	    // Create TFOOT section -- currently used for debugging only
	    var tFooter = document.createElement('tfoot');
	    tFooter.className = "tfoot";
	    tFooter.id = "birthday-tfoot";

	    var footerTR = document.createElement("tr");
	    footerTR.className = "tr-foot";
	    footerTR.id = "birthday-tr-foot";

	    var footerTD = document.createElement("td");
	    footerTD.colSpan ="2";
	    footerTD.className = "td-foot";
	    footerTD.id = "birthday-td-foot";
	    if (this.config.debugging) {
		footerTD.innerHTML = "Birthdaylist is currently in DEBUG mode!<br />Please see console log.";
	    }
	    else {
		footerTD.innerHTML = "";
	    }

	    footerTR.appendChild(footerTD);
	    tFooter.appendChild(footerTR);
	    wrapper.appendChild(tFooter);
			
	    // Create TBODY section with day names
	    var eintraege = 3;
	    for (var i=1; i<=eintraege; i++) {
		var tBody = document.createElement("tBody");
		tBody.className = "tbody";
		tBody.id = "birthday-tbody";

		var bodyTR = document.createElement("tr");
		bodyTR.className = "tr-body";
		bodyTR.id = "birthday-tr-body";

		var bodyTDimage = document.createElement("td");
		bodyTDimage.className = "td-image";
		bodyTDimage.id = "birthday-td-image";
		bodyTDimage.innerHTML = "23";

		var bodyTD = document.createElement("td");
		bodyTD.className = "td-body";
		bodyTD.id = "birthday-td-body";
		bodyTD.innerHTML = "Bettina Zimmermann&nbsp;&nbsp;<span class=\"age-span\">46</span></br>Frank Dubiel&nbsp;&nbsp;<span class=\"age-span\">54</span></br>Jürgen Gruse&nbsp;&nbsp;<span class=\"age-span\">52</span>";

/*
		var bodyAgeSpan = document.createElement("span");
		bodyAgeSpan.className = "age-span";
		bodyAgeSpan.id = "birthday-age-span";
		bodyAgeSpan.innerHTML = "&nbsp;&nbsp;46";
		bodyTD.appendChild(bodyAgeSpan);
*/		

		bodyTR.appendChild(bodyTDimage);
		bodyTR.appendChild(bodyTD);
		tBody.appendChild(bodyTR);
		wrapper.appendChild(tBody);
	    }
	
	    this.loaded = true;
	    return wrapper;
	}

the data here are text, ifilles in, no variables …

black screen, again. this is my perlchamp.js:

Module.register("perlchamp", {

	defaults: {
		language: "de",
		dimmEntries: true   // true: dims entries and the associated 
							//       symbol when the date has expired.
							// false: delete entries and the associated 
							//        symbol when the date has expired.
	},

	init: function(){
		Log.log(this.name + " is in init!");
	},

	start: function(){
		Log.log("Starting module: " + this.name);

		// Set locale
		moment.locale(config.language);
	},

	loaded: function(callback) {
		Log.log(this.name + " is loaded!");
		callback();
	},

	// return list of other functional scripts to use, if any (like require in node_helper)
	getScripts: function() {
		return	["moment.js"];
	}, 

	// return list of stylesheet files to use if any
	getStyles: function() {
		return 	[this.data.path + "/css/perlchamp.css"];
	},

/*
	// return list of translation files to use, if any
	getTranslations: function() {
		return {
			// sample of list of files to specify here, if no files, do not use this routine, , or return empty list

			// en: "translations/en.json",  (folders and filenames in your module folder)
			// de: "translations/de.json"
		}
	},
*/


	// only called if the module header was configured in module config in config.js
	getHeader: function() {
		return this.data.header;
	},

	// messages received from other modules and the system (NOT from your node helper)
	// payload is a notification dependent data structure
	notificationReceived: function(notification, payload, sender) {
		// once everybody is loaded up
		if(notification==="ALL_MODULES_STARTED"){
			// send our config to our node_helper
			this.sendSocketNotification("CONFIG",this.config);
		}
		if (sender) {
			Log.log(this.name + " received a module notification: " + notification + " from sender: " + sender.name);
		} else {
			Log.log(this.name + " received a system notification: " + notification);
		}
	},

	
	// messages received from from your node helper (NOT other modules or the system)
	// payload is a notification dependent data structure, up to you to design between module and node_helper
	socketNotificationReceived: function(notification, payload) {
/*
		Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
		if(notification === "message_from_helper"){
			this.config.message = payload;
			// tell mirror runtime that our data has changed,
			// we will be called back at GetDom() to provide the updated content
			this.updateDom(1000);
		}
*/
		if(notification === "have data"){

			Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
			
			var now = moment();
			var active_birthdays = {};

			for(var birthday of payload) {
				// get 1st 5 chars of birthdate, thru month
				// we will use this as the key in the hash
				var birth_date = birthday.birth.subString(0,4);
				
				// get the birthday as a moment in this year, for comparing
				var birth_date_moment = moment(birth_date + now.getYear(),"DD.MMYYYY");

				// u can add days to a moment object and then compare 
				//     if the birthdate is before that date (and after now)
				//     so within the next xx days

				// if the date is the same or later, don't use time of day
				if(birth_date.startOf('day').isSame(now.startOf('day'))) {

					// birthday is in this month
					// check the hash if we've seen anything for today yet
					// if we haven't see this date yet
					if(active_birthdays[birth_date] == undefined){
           
						//  create the holder for its info (array of 
						//		names) in the hash
						active_birthdays[birth_date] = [];
					}
					// save the persons name on the list
					active_birthdays[birth_date].push(birthday.name);
				}
			}
     
			// tell MM to call and get our content
			self.updateDom();
		}     			
			
/*			
			this.config.message = payload;
			// tell mirror runtime that our data has changed,
			// we will be called back at GetDom() to provide the updated content
			this.updateDom(1000)
			
			// filters the birthdaylist and output only the birthdays
			// of the current month, sorted (ascending) by days in 
			// the following format: 
			// [{ day: "10", name: ["firstname lastname",...] }]

			// set variables
			var today_month = moment().format("MM");
			var today_day_month = moment().format("DD.MM");

			var result = Object.entries(jsonObj
			.filter(({birth}) => birth.split('.')[1] === today_month)
			.reduce((a, {birth, name}) => {
				const day = +birth.split('.')[0];
				a[day] = [...(a[day] || []), name];
				return a
			}, {})
			).map(([day, name]) => ({day, name})).sort((a, b) => +a.day - b.day);
			birthdaysArray = result;
			
			// for debugging only
			//console.log("filtered and sorted: ", birthdaysArray);
*/
			
	},

	// system notification your module is being hidden
	// typically you would stop doing UI updates (getDom/updateDom) if the module is hidden
	suspend: function(){

	},

	// system notification your module is being unhidden/shown
	// typically you would resume doing UI updates (getDom/updateDom) if the module is shown
	resume: function(){

	},

	// this is the major worker of the module, it provides the displayable content for this module
	getDom: function() {
		var wrapper = document.createElement("div");

		for(var birthday of Object.keys(this.active_birthdays)){
			for(var name of this.active_birthdays[birthday]){
				var m = document.createElement('div');
				m.innerText = birthday + ' '+ name;
				wrapper.appendChild(m);
			}
		}

		// pass the created content back to MM to add to DOM.
		return wrapper;
	}
})

this the node_helper.js:

var NodeHelper = require("node_helper");
var moment = require("moment");

// add require of other javascripot components here
// var xxx = require('yyy'); here
const csv = require("csvtojson");
var birthdaysArray = [];

module.exports = NodeHelper.create({

	init(){
		console.log("init module helper perlchamp");
	},

	start() {
		var self = this;
		console.log("Starting module helper: " + this.name);

		// convert the csv-file into a JSON-String
		const csvFilePath = this.path + '/data/birthdays.csv';
		csv()
		.fromFile(csvFilePath)
		.then((jsonObj)=>{      
			birthdaysArray = JSON.stringify(jsonObj);
			
			// for debugging only
			//console.log("birthdaysArray: ", birthdaysArray);
			
			// send data to [modulname].js
			self.sendSocketNotification("have data", jsonObj);
		})		
	},
	
	stop(){
		console.log("Stopping module helper: " + this.name);
	},

	// handle messages from our module// each notification indicates a different messages
	// payload is a data structure that is different per message.. up to you to design this
	socketNotificationReceived(notification, payload) {				
		// if config message from module
		if (notification === "CONFIG") {
			// save payload config info
			this.config = payload;
			// wait 15 seconds, send a message back to module
			setTimeout(()=> { this.sendSocketNotification("message_from_helper"," this is a test_message")}, 15000);
		}
		else if(notification === "????2") {
		}
	},
});

these are the terminal outputs:

dirk@raspberrypi:~/MagicMirror/modules/perlchamp $ npm start

> magicmirror@2.11.0 start /home/dirk/MagicMirror
> DISPLAY="${DISPLAY:=:0}" ./node_modules/.bin/electron js/electron.js

[2020-05-02 02:52:02.407] [LOG]    Starting MagicMirror: v2.11.0
[2020-05-02 02:52:02.414] [LOG]    Loading config ...
[2020-05-02 02:52:02.418] [LOG]    Loading module helpers ...
[2020-05-02 02:52:02.424] [LOG]    Initializing new module helper ...
[2020-05-02 02:52:02.425] [LOG]    Module helper loaded: MMM-Logging
[2020-05-02 02:52:02.579] [LOG]    init module helper perlchamp
[2020-05-02 02:52:02.580] [LOG]    Module helper loaded: perlchamp
[2020-05-02 02:52:02.580] [LOG]    All module helpers loaded.
[2020-05-02 02:52:02.711] [LOG]    Starting server on port 8080 ... 
[2020-05-02 02:52:02.718] [INFO]   You're using a full whitelist configuration to allow for all IPs
[2020-05-02 02:52:02.726] [LOG]    Server started ...
[2020-05-02 02:52:02.727] [LOG]    Connecting socket for: MMM-Logging
[2020-05-02 02:52:02.727] [LOG]    Module helper started for MMM-Logging
[2020-05-02 02:52:02.728] [LOG]    Connecting socket for: perlchamp
[2020-05-02 02:52:02.728] [LOG]    Starting module helper: perlchamp
[2020-05-02 02:52:02.732] [LOG]    Sockets connected & modules started ...
[2020-05-02 02:52:02.829] [LOG]    Launching application.
[2020-05-02 02:52:04.803] [LOG]    Starting module: perlchamp (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:34 Class.socketNotificationReceived)
[2020-05-02 02:52:04.805] [LOG]    All modules started! (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:37 Class.socketNotificationReceived)
[2020-05-02 02:52:04.806] [LOG]     payload: undefined (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:31 Class.socketNotificationReceived)
[2020-05-02 02:52:04.807] [LOG]    perlchamp received a system notification: ALL_MODULES_STARTED (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:34 Class.socketNotificationReceived)
[2020-05-02 02:52:04.810] [ERROR]  {} (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:43 Class.socketNotificationReceived)
[2020-05-02 02:52:04.811] [LOG]    Browser Error: {} (/home/dirk/MagicMirror/modules/MMM-Logging/node_helper.js:46 Class.socketNotificationReceived)
[2020-05-02 02:52:07.185] [LOG]    Shutting down server... (/home/dirk/MagicMirror/js/electron.js:105 App.<anonymous>)
[2020-05-02 02:52:07.188] [LOG]    Stopping module helper: MMM-Logging (/home/dirk/MagicMirror/js/node_helper.js:33 Class.stop)
[2020-05-02 02:52:07.190] [LOG]    Stopping module helper: perlchamp (/home/dirk/MagicMirror/modules/perlchamp/node_helper.js:39 Class.stop)
dirk@raspberrypi:~/MagicMirror/modules/perlchamp $ 

i didn’t never seen the notification “have data” …

so, sam, everything is fixed :-)
but now i don’t know how to handle the receiving data. i only need a little entry … don’t know how to handle this object-element. actually nothing is displayed except the header i configured …

ok, thanks