Use local timezone for log and history dates

panels/history/ha-panel-history.html

@@ -36,7 +36,7 @@
 
       <div class$="[[computeContentClasses(narrow)]]">
         <paper-input label='Showing entries for' id='datePicker'
-          value='[[selectedDate]]'></paper-input>
+          value='[[selectedDateStr]]'></paper-input>
 
         <state-history-charts state-history="[[stateHistory]]"
           is-loading-data="[[isLoadingData]]"></state-history-charts>
@@ -94,6 +94,20 @@ Polymer({
         return hass.entityHistoryGetters.currentDate;
       },
     },
+
+    selectedDateStr: {
+      type: String,
+      value: null,
+      bindNuclear: function (hass) {
+        return [
+            hass.entityHistoryGetters.currentDate,
+            function (currentDate) {
+                var dateObj = new Date(currentDate);
+                return dateObj.toLocaleDateString();
+            },
+        ];
+      },
+    },
   },
 
   isDataLoadedChanged: function (newVal) {

panels/logbook/ha-panel-logbook.html

@@ -37,7 +37,7 @@
           <paper-input
             label='Showing entries for'
             id='datePicker'
-            value='[[selectedDate]]'
+            value='[[selectedDateStr]]'
             on-focus='datepickerFocus'
           ></paper-input>
 
@@ -77,6 +77,20 @@ Polymer({
       },
     },
 
+    selectedDateStr: {
+      type: String,
+      value: null,
+      bindNuclear: function (hass) {
+        return [
+            hass.logbookGetters.currentDate,
+            function (currentDate) {
+                var dateObj = new Date(currentDate);
+                return dateObj.toLocaleDateString();
+            },
+        ];
+      },
+    },
+
     isLoading: {
       type: Boolean,
       bindNuclear: function (hass) {