Magento 2.3 patch for pull request magento/magento#27311

MAGENTO_27311.patch

--- view/base/web/js/form/element/date.orig.js	2019-09-19 12:30:58.000000000 +0200
+++ view/base/web/js/form/element/date.js	2020-03-17 11:51:49.691288844 +0100
@@ -111,21 +111,19 @@
          * Prepares and sets date/time value that will be displayed
          * in the input field.
          *
-         * @param {String} value
+         * @inheritDoc
          */
-        onValueChange: function (value) {
-            var shiftedValue;
+        setInitialValue: function () {
+            const value = this.getInitialValue();
+            let shiftedValue;
 
             if (value) {
                 if (this.options.showsTime) {
                     shiftedValue = moment.tz(value, 'UTC').tz(this.storeTimeZone);
                 } else {
-                    shiftedValue = moment(value, this.outputDateFormat);
-                }
-
-                if (!shiftedValue.isValid()) {
                     shiftedValue = moment(value, this.inputDateFormat);
                 }
+
                 shiftedValue = shiftedValue.format(this.pickerDateTimeFormat);
             } else {
                 shiftedValue = '';
@@ -134,6 +132,8 @@
             if (shiftedValue !== this.shiftedValue()) {
                 this.shiftedValue(shiftedValue);
             }
+
+            return this._super();
         },
 
         /**

Thanks, works great!