I have modified the code that will change the date format to the correct date format which js required.

api/customer_satellites.js

@@ -1,10 +1,10 @@
 const fs = require("fs");
-
+const formatDate = require("./date_convertor")
 let launchers = require("../data/customer_satellites.json");
 
 module.exports = async (req, res) => {
     try {
-        res.send(launchers);
+        res.send({"customer_satellites":formatDate(launchers.customer_satellites)})
     } catch (error) {
         res.status(500);
         const response = error.response || {};

api/date_convertor.js

@@ -0,0 +1,43 @@
+/**
+ * Function to extract year, month, and day from a date string in the format "DD-MM-YYYY".
+ * @param {string} currentDate - The date string in the format "DD-MM-YYYY".
+ * @returns {string} A string representing the date in the format "YYYY-MM-DD".
+ * @throws {Error} Throws an error if the date format is invalid.
+ */
+const extractMYD = (currentDate) => {
+    try {
+        // Check if the date string is provided and is of type string
+        if (!currentDate || typeof currentDate !== 'string') {
+            throw new Error('Invalid date format');
+        }
+
+        // Split the date string into day, month, and year components
+        const [day, month, year] = currentDate.split('-');
+
+        // Check if all components are present
+        if (!day || !month || !year) {
+            throw new Error('Invalid date format');
+        }
+
+        // Return the formatted date string in the format "YYYY-MM-DD"
+        return `${year}-${month}-${day}`;
+    } catch (e) {
+        // If any error occurs, throw an "Invalid date format" error
+        throw new Error('Invalid date format');
+    }
+}
+
+/**
+ * Function to format the launch_date property of each record in an array of records.
+ * @param {Array} records - An array of records, each containing a launch_date property.
+ * @returns {Array} An array of records with the launch_date property formatted as "YYYY-MM-DD".
+ */
+const formatDate = (records) => {
+    return records.map(record => {
+        // Format the launch_date property of each record using the extractMYD function
+        record.launch_date = extractMYD(record.launch_date);
+        return record;
+    });
+}
+
+module.exports = formatDate;