diff --git a/routes/adminTimesheetsOverview.vue b/routes/adminTimesheetsOverview.vue
index d667f4f5c..7a3c553f5 100644
--- a/routes/adminTimesheetsOverview.vue
+++ b/routes/adminTimesheetsOverview.vue
@@ -21,6 +21,12 @@
                 <li v-for="(_, period) in PERIODS" class="list-inline-item">
                     <a href="#" @click.prevent="setPeriod(period)" class="btn btn-outline-primary">{{period}}</a>
                 </li>
+                <li class="list-inline-item">
+                    <a href="#" @click.prevent="addPeriod({months: -1})" class="btn btn-outline-primary">&lt;</a>
+                </li>
+                <li class="list-inline-item">
+                    <a href="#" @click.prevent="addPeriod({months: 1})" class="btn btn-outline-primary">&gt;</a>
+                </li>
             </ul>
             <div class="input-group mb-3">
                 <span class="input-group-text">Start:</span>
@@ -62,6 +68,12 @@
                     </ul>
                 </td>
             </tr>
+            <tr>
+                <th>Sum</th>
+                <td>{{ hoursSumTotal }}</td>
+                <td></td>
+                <td></td>
+            </tr>
             </tbody>
         </table>
     </div>
@@ -99,6 +111,15 @@ export default {
         setPeriod(period) {
             [this.startYear, this.startMonth, this.endYear, this.endMonth] = PERIODS[period];
         },
+        addPeriod(offset) {
+            const startTime = DateTime.fromObject({year: this.startYear, month: this.startMonth}).plus(offset);
+            const endTime = DateTime.fromObject({year: this.endYear, month: this.endMonth}).plus(offset);
+
+            this.startYear = startTime.year;
+            this.startMonth = startTime.month;
+            this.endYear = endTime.year;
+            this.endMonth = endTime.month;
+        },
         isInRange(year, month) {
             const x = DateTime.local(year, month, 15);
             const begin = DateTime.local(this.startYear, this.startMonth, 1).startOf('month');
@@ -137,6 +158,13 @@ export default {
             }
             return sum;
         },
+        hoursSumTotal() {
+            let sum = 0;
+            for (let username in this.hoursSummary) {
+                sum += this.hoursSummary[username];
+            }
+            return sum;
+        },
     },
     head() {
         return head({
diff --git a/src/timesheets.js b/src/timesheets.js
index 109570b30..518c3a9a0 100644
--- a/src/timesheets.js
+++ b/src/timesheets.js
@@ -1,6 +1,8 @@
 import {DateTime} from "luxon";
 
-export const max = DateTime.now();
+const now = DateTime.now();
+const prevMonth = now.minus({months: 1});
+export const max = now;
 export const min = DateTime.local(2020, 1, 1);
 export const closed = DateTime.now().minus({ months: 1 }).startOf('month');
 
@@ -46,4 +48,6 @@ export const TRANSFER_METHODS = {
 export const PERIODS = {
     '2020-2022': [2020, 1, 2022, 12],
     '2023': [2023, 1, 2023, 12],
+    'previous month': [now.year, now.month, now.year, now.month],
+    'current month': [prevMonth.year, prevMonth.month, prevMonth.year, prevMonth.month],
 }