diff --git a/src/main/angular/src/app/location/detail/location-detail.html b/src/main/angular/src/app/location/detail/location-detail.html
index 3184c3b..3732e2d 100644
--- a/src/main/angular/src/app/location/detail/location-detail.html
+++ b/src/main/angular/src/app/location/detail/location-detail.html
@@ -2,21 +2,32 @@
 
   <app-location-power [location]="location"></app-location-power>
 
-  <app-location-energy [location]="location" [interval]="Interval.DAY" heading="Heute"></app-location-energy>
-
-  <app-location-energy [location]="location" [interval]="Interval.DAY" [offset]="offset">
+  <app-location-energy [location]="location" [interval]="Interval.DAY" [offset]="offsetDay">
     <ng-content #SeriesHistoryHeading>
       <div style="display: flex; width: 100%">
         &nbsp;
-        <div (click)="offset += 1">&larr;</div>
+        <div (click)="offsetDay += 1">&larr;</div>
         &nbsp;
-        <div (click)="offset = Math.max(1, offset -1)">&rarr;</div>
+        <div (click)="offsetDay = Math.max(0, offsetDay -1)">&rarr;</div>
         &nbsp;
         <div style="flex: 1">{{ offsetDayTitle() }}</div>
       </div>
     </ng-content>
   </app-location-energy>
 
+  <app-location-energy [location]="location" [interval]="Interval.MONTH" [offset]="offsetMonth">
+    <ng-content #SeriesHistoryHeading>
+      <div style="display: flex; width: 100%">
+        &nbsp;
+        <div (click)="offsetMonth += 1">&larr;</div>
+        &nbsp;
+        <div (click)="offsetMonth = Math.max(0, offsetMonth -1)">&rarr;</div>
+        &nbsp;
+        <div style="flex: 1">{{ offsetMonthTitle() }}</div>
+      </div>
+    </ng-content>
+  </app-location-energy>
+
   <div class="Section">
     <div class="SectionHeading">
       <div class="SectionHeadingText">
diff --git a/src/main/angular/src/app/location/detail/location-detail.ts b/src/main/angular/src/app/location/detail/location-detail.ts
index d8ba6ee..18c1dac 100644
--- a/src/main/angular/src/app/location/detail/location-detail.ts
+++ b/src/main/angular/src/app/location/detail/location-detail.ts
@@ -41,7 +41,9 @@ export class LocationDetail implements OnInit, OnDestroy {
 
   private readonly subs: Subscription [] = [];
 
-  protected offset: number = 1;
+  protected offsetDay: number = 0;
+
+  protected offsetMonth: number = 0;
 
   private readonly datePipe: DatePipe;
 
@@ -76,16 +78,21 @@ export class LocationDetail implements OnInit, OnDestroy {
   }
 
   protected offsetDayTitle(): string {
-    if (this.offset === 1) {
+    if (this.offsetDay === 0) {
+      return 'Heute';
+    } else if (this.offsetDay === 1) {
       return 'Gestern';
     } else {
-      if (this.offset < 7) {
-        const d = new Date(this.dateService.now);
-        d.setDate(d.getDate() - this.offset);
-        return this.datePipe.transform(d, 'EEEE') || '';
-      }
-      return `Vor ${this.offset} Tagen`;
+      const d = new Date(this.dateService.now);
+      d.setDate(d.getDate() - this.offsetDay);
+      return this.datePipe.transform(d, 'dd.MM.yyyy EEEE') || '';
     }
   }
 
+  protected offsetMonthTitle(): string {
+    const d = new Date(this.dateService.now);
+    d.setMonth(d.getMonth() - this.offsetMonth);
+    return this.datePipe.transform(d, 'yyyy MMMM') || '';
+  }
+
 }
diff --git a/src/main/angular/src/app/series/Interval.ts b/src/main/angular/src/app/series/Interval.ts
index c28ec48..06c37fa 100644
--- a/src/main/angular/src/app/series/Interval.ts
+++ b/src/main/angular/src/app/series/Interval.ts
@@ -8,7 +8,7 @@ export class Interval {
 
   static readonly WEEK = new Interval('WEEK', this.HOUR);
 
-  static readonly MONTH = new Interval('MONTH', this.HOUR);
+  static readonly MONTH = new Interval('MONTH', this.DAY);
 
   static readonly YEAR = new Interval('YEAR', this.DAY);