create utils file for easy use

src/Utils.js

+import PushNotification from 'react-native-push-notification';
+import moment from 'moment'
+
+export function formatDate(date) {
+  var monthNames = [
+    "January", "February", "March",
+    "April", "May", "June", "July",
+    "August", "September", "October",
+    "November", "December"
+  ];
+
+  var day = date.getDate();
+  var monthIndex = date.getMonth();
+
+  return 'Today, ' + day + ' ' + monthNames[monthIndex];
+}
+
+export function scheduleLocalNotification(message, date, id, payload) {
+  //message: type String
+  //date: type String  format 'YYYY-MM-DD HH:mm' (NOTIFICATION_DATE_TIME_FORMAT)
+
+  //construct the notification parameters
+  // const fireDate = moment(date, NOTIFICATION_DATE_TIME_FORMAT).toDate();
+  const fireDate = date
+  const notification = {
+    id: id, //for android cancel notification (must be stringified number)
+    message,
+    number: 0, //necessary for iOS cancellation (not sure why)
+    date: fireDate,
+    //for android only
+    data: JSON.stringify(payload),
+  };
+
+  //schedule the notification
+  PushNotification.localNotificationSchedule(notification);
+}
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