diff --git a/components/ConfigurationsSelectedItem.vue b/components/ConfigurationsSelectedItem.vue
index e71f5e6bfdf1bc99aedc8da391d2f2734ad92ec3..daf4193017a9d1930a048a1776796b5bd6af420c 100644
--- a/components/ConfigurationsSelectedItem.vue
+++ b/components/ConfigurationsSelectedItem.vue
@@ -70,6 +70,7 @@ permissions and limitations under the Licence.
                 <v-col>
                   <label>Mounted:</label>
                   {{ value.unpack().date | dateToDateTimeString }}
+                  <span class="text-caption text--secondary">(UTC)</span>
                 </v-col>
               </v-row>
               <v-row>
@@ -194,6 +195,7 @@ permissions and limitations under the Licence.
                   <v-list-item-content>
                     <v-list-item-title>
                       Update for {{ value.unpack().date | dateToDateTimeStringHHMM }}
+                      <span class="text-caption text--secondary">(UTC)</span>
                     </v-list-item-title>
                   </v-list-item-content>
                 </v-list-item>
@@ -204,6 +206,7 @@ permissions and limitations under the Licence.
                   <v-list-item-content>
                     <v-list-item-title>
                       Update for {{ selectedDate | dateToDateTimeStringHHMM }}
+                      <span class="text-caption text--secondary">(UTC)</span>
                     </v-list-item-title>
                   </v-list-item-content>
                 </v-list-item>
diff --git a/components/DateTimePicker.vue b/components/DateTimePicker.vue
index a9c633b264664b089589166bb7e6cd45ea8a2ef3..4d0a143527e7591744056932d3f4d7be2e1c8f4f 100644
--- a/components/DateTimePicker.vue
+++ b/components/DateTimePicker.vue
@@ -34,6 +34,8 @@ permissions and limitations under the Licence.
     :value="valueAsDateTimeString"
     :label="label"
     :rules="textInputRules"
+    hint="The referenced time zone is UTC."
+    persistent-hint
     v-bind="$attrs"
     @input="updateByTextfield"
   >
@@ -77,6 +79,9 @@ permissions and limitations under the Licence.
                   class="height-adjustment"
                   @input="setTimePickerValue"
                 />
+                <p class="text-caption">
+                  The referenced time zone is UTC.
+                </p>
               </v-tab-item>
             </v-tabs>
           </v-card-text>
diff --git a/components/actions/DeviceCalibrationActionCard.vue b/components/actions/DeviceCalibrationActionCard.vue
index 2738455e860459b928d518f1e1a45c5d662eed7c..01131cc614a51ffaa546c30352412135aff68f80 100644
--- a/components/actions/DeviceCalibrationActionCard.vue
+++ b/components/actions/DeviceCalibrationActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ value.currentCalibrationDate | toUtcDate }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
@@ -94,6 +95,7 @@ permissions and limitations under the Licence.
                 Next calibration date
               </label>
               {{ value.nextCalibrationDate | toUtcDate }}
+              <span class="text-caption text--secondary">(UTC)</span>
             </v-col>
           </v-row>
           <div v-if="value.measuredQuantities && value.measuredQuantities.length > 0">
diff --git a/components/actions/DeviceMountActionCard.vue b/components/actions/DeviceMountActionCard.vue
index 248f68ab5f9b4be67942c068bcd160c18d1c61e4..ad027e30ac1721ecbb4e40fa95a32cf50a4e359c 100644
--- a/components/actions/DeviceMountActionCard.vue
+++ b/components/actions/DeviceMountActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ value.basicData.date | toUtcDate }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
diff --git a/components/actions/DeviceUnmountActionCard.vue b/components/actions/DeviceUnmountActionCard.vue
index dc6659ca2382d14ede8157215c85b9bf4fe03483..9e8496c1ca071b7b2d63b816ce1c709120d0b6fe 100644
--- a/components/actions/DeviceUnmountActionCard.vue
+++ b/components/actions/DeviceUnmountActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ value.basicData.date | toUtcDate }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
diff --git a/components/actions/GenericActionCard.vue b/components/actions/GenericActionCard.vue
index 56e97596155ec7e1adc50c3d06ba5364142f6558..435d446e70bf0c6b03e56d4f76d7cc902b2c1f09 100644
--- a/components/actions/GenericActionCard.vue
+++ b/components/actions/GenericActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ actionDate }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
diff --git a/components/actions/PlatformMountActionCard.vue b/components/actions/PlatformMountActionCard.vue
index 1e23b3a8b2863fcd52a0c51ae2cac0307d7c1eff..ffbb53aa6aa8ef8413318fb3e788d91eed83c21a 100644
--- a/components/actions/PlatformMountActionCard.vue
+++ b/components/actions/PlatformMountActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ value.basicData.date | dateToDateTimeString }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
diff --git a/components/actions/PlatformUnmountActionCard.vue b/components/actions/PlatformUnmountActionCard.vue
index bb60ff998f9f3de19acfad4630d09d01183002e1..f6463220b0413e26a5d64adbd411be361321112b 100644
--- a/components/actions/PlatformUnmountActionCard.vue
+++ b/components/actions/PlatformUnmountActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ value.basicData.date | dateToDateTimeString }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
diff --git a/components/actions/SoftwareUpdateActionCard.vue b/components/actions/SoftwareUpdateActionCard.vue
index c463e52a5ee44c7f6b10e9036ed91477519d60c2..90794b16d221f707cc75b79e347d33b9c86b842b 100644
--- a/components/actions/SoftwareUpdateActionCard.vue
+++ b/components/actions/SoftwareUpdateActionCard.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-row no-gutters>
         <v-col>
           {{ value.updateDate | toUtcDate }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </v-col>
         <v-col
           align-self="end"
diff --git a/components/configurations/ConfigurationDynamicLocationBeginActionData.vue b/components/configurations/ConfigurationDynamicLocationBeginActionData.vue
index 8f7dd0a606f9c6518ef5c9c10fbbbbc6b8eaa260..1187b53be7dd690546c1fa7f0d51586bdfa9ee8c 100644
--- a/components/configurations/ConfigurationDynamicLocationBeginActionData.vue
+++ b/components/configurations/ConfigurationDynamicLocationBeginActionData.vue
@@ -35,6 +35,7 @@ permissions and limitations under the Licence.
       <v-col>
         <label>Begin date</label>
         {{ value.beginDate | dateToDateTimeStringHHMM }}
+        <span class="text-caption text--secondary">(UTC)</span>
       </v-col>
     </v-row>
     <v-row>
diff --git a/components/configurations/ConfigurationDynamicLocationEndActionData.vue b/components/configurations/ConfigurationDynamicLocationEndActionData.vue
index a69525b8493583ae17c42cfa7707b5e8cb107a84..a2c5a7c4baae6f30bdbbf315dc5b78a66f465c8b 100644
--- a/components/configurations/ConfigurationDynamicLocationEndActionData.vue
+++ b/components/configurations/ConfigurationDynamicLocationEndActionData.vue
@@ -35,6 +35,7 @@ permissions and limitations under the Licence.
       <v-col>
         <label>End date</label>
         {{ value.endDate | dateToDateTimeStringHHMM }}
+        <span class="text-caption text--secondary">(UTC)</span>
       </v-col>
     </v-row>
     <v-row>
diff --git a/components/configurations/ConfigurationStaticLocationBeginActionData.vue b/components/configurations/ConfigurationStaticLocationBeginActionData.vue
index 1ad541596442ef8955db1589fea3f0b6a398bdf0..2049f8e4955dd3412446561a788070a74e5b4646 100644
--- a/components/configurations/ConfigurationStaticLocationBeginActionData.vue
+++ b/components/configurations/ConfigurationStaticLocationBeginActionData.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-col>
         <label>Begin date</label>
         {{ value.beginDate | dateToDateTimeStringHHMM }}
+        <span class="text-caption text--secondary">(UTC)</span>
       </v-col>
     </v-row>
     <v-row>
diff --git a/components/configurations/ConfigurationStaticLocationEndActionData.vue b/components/configurations/ConfigurationStaticLocationEndActionData.vue
index e9cf8a8e7c558329f671e814596f66539be0e5b8..de0e1abe33be8c845e51ad7da2f52b39fc44f18e 100644
--- a/components/configurations/ConfigurationStaticLocationEndActionData.vue
+++ b/components/configurations/ConfigurationStaticLocationEndActionData.vue
@@ -34,6 +34,7 @@ permissions and limitations under the Licence.
       <v-col>
         <label>End date</label>
         {{ value.endDate | dateToDateTimeStringHHMM }}
+        <span class="text-caption text--secondary">(UTC)</span>
       </v-col>
     </v-row>
     <v-row>
diff --git a/components/configurations/ConfigurationsBasicData.vue b/components/configurations/ConfigurationsBasicData.vue
index 5a195665cb983d2e6c617e33d4b64b940706ac5d..008dc5c7ae5407c820beb869b01650422a86cae6 100644
--- a/components/configurations/ConfigurationsBasicData.vue
+++ b/components/configurations/ConfigurationsBasicData.vue
@@ -53,12 +53,14 @@ permissions and limitations under the Licence.
         <label>Start date</label>
         <span v-if="value.startDate">
           {{ value.startDate | dateToDateTimeString }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </span>
       </v-col>
       <v-col cols="12" md="3">
         <label>End date</label>
         <span v-if="value.endDate">
           {{ value.endDate | dateToDateTimeString }}
+          <span class="text-caption text--secondary">(UTC)</span>
         </span>
       </v-col>
     </v-row>
diff --git a/components/configurations/ConfigurationsOverviewCard.vue b/components/configurations/ConfigurationsOverviewCard.vue
index dc6b3ab326de647b76f6afcb9a59cabe9498ff8a..cfeced0945ebd3d652a7aa3d670ac854ee805242 100644
--- a/components/configurations/ConfigurationsOverviewCard.vue
+++ b/components/configurations/ConfigurationsOverviewCard.vue
@@ -165,6 +165,12 @@ permissions and limitations under the Licence.
                   class="nowrap-truncate"
                 >
                   {{ configuration.startDate | dateToDateTimeString }}
+                  <span
+                    v-if="configuration.startDate"
+                    class="text-caption text--secondary"
+                  >
+                    (UTC)
+                  </span>
                 </v-col>
                 <v-col
                   cols="4"
@@ -187,6 +193,12 @@ permissions and limitations under the Licence.
                   class="nowrap-truncate"
                 >
                   {{ configuration.endDate | dateToDateTimeString }}
+                  <span
+                    v-if="configuration.endDate"
+                    class="text-caption text--secondary"
+                  >
+                    (UTC)
+                  </span>
                 </v-col>
               </v-row>
             </v-card-text>
diff --git a/components/configurations/ConfigurationsTimelineActionCard.vue b/components/configurations/ConfigurationsTimelineActionCard.vue
index 2c821f43ad59ef23f8543abed7441e06e49e7f38..88e67aaf11cf33f49c4a02a73efdbc8765a9e3e1 100644
--- a/components/configurations/ConfigurationsTimelineActionCard.vue
+++ b/components/configurations/ConfigurationsTimelineActionCard.vue
@@ -41,6 +41,7 @@ permissions and limitations under the Licence.
             <v-col cols="12">
               <v-card-subtitle class="pb-0">
                 {{ action.date | dateToDateTimeString }}
+                <span class="text-caption text--secondary">(UTC)</span>
               </v-card-subtitle>
             </v-col>
           </v-row>
diff --git a/pages/configurations/_id/actions.vue b/pages/configurations/_id/actions.vue
index 19fbb0e1a024db8680d464b5d25e889b14379d09..81143de0bd3c1e2ef728c13eedde92cab67ed985 100644
--- a/pages/configurations/_id/actions.vue
+++ b/pages/configurations/_id/actions.vue
@@ -77,15 +77,11 @@ import {
 } from '@/utils/configurationInterfaces'
 
 import { byDateOldestLast } from '@/modelUtils/mountHelpers'
-import { dateToDateTimeString } from '@/utils/dateHelper'
 
 import ConfigurationsTimelineActionCard from '@/components/configurations/ConfigurationsTimelineActionCard.vue'
 
 @Component({
-  components: { ConfigurationsTimelineActionCard },
-  filters: {
-    dateToDateTimeString
-  }
+  components: { ConfigurationsTimelineActionCard }
 })
 export default class ConfigurationActions extends Vue {
   @Prop({
diff --git a/pages/configurations/_id/locations.vue b/pages/configurations/_id/locations.vue
index df3123f6ce8747fc09db805be83f780f763c1762..a8c5ae6b2ed60b413268101225c07158bdf58ab8 100644
--- a/pages/configurations/_id/locations.vue
+++ b/pages/configurations/_id/locations.vue
@@ -61,6 +61,8 @@ permissions and limitations under the Licence.
             label="Dates defined by actions"
             :readonly="isInEditMode"
             :disabled="isInEditMode"
+            hint="The referenced time zone is UTC."
+            persistent-hint
           />
         </v-col>
       </v-row>
diff --git a/pages/configurations/_id/platforms-and-devices.vue b/pages/configurations/_id/platforms-and-devices.vue
index 059b90779adf9c472e437e6ef9e08155b27a2926..98d545fd8c171b9929f2cfcfcf9eb1cc73d9ee72 100644
--- a/pages/configurations/_id/platforms-and-devices.vue
+++ b/pages/configurations/_id/platforms-and-devices.vue
@@ -53,6 +53,8 @@ permissions and limitations under the Licence.
             :item-text="(x) => x.text"
             :items="actionDates"
             label="Dates defined by actions"
+            hint="The referenced time zone is UTC."
+            persistent-hint
           />
         </v-col>
       </v-row>