diff --git a/src/app/pages/borrow/items/item.edit.html b/src/app/pages/borrow/items/item.edit.html
index c9b2fea..6d06b53 100644
--- a/src/app/pages/borrow/items/item.edit.html
+++ b/src/app/pages/borrow/items/item.edit.html
@@ -90,7 +90,7 @@
       <ng-container *ngFor="let slotForm of slots.controls; let i = index">
         <div [formGroup]="slotForm" fxLayout="row wrap" fxLayoutAlign="start stretch" fxLayoutGap="24px grid">
           <mat-form-field>
-            <input matInput [ngxMatDatetimePicker]="slotStartPicker" formControlName="start"
+            <input matInput [ngxMatDatetimePicker]="slotStartPicker" readonly formControlName="start"
               placeholder="{{'borrow.items.slot.start' | i18n}}">
             <mat-datepicker-toggle matSuffix [for]="slotStartPicker"></mat-datepicker-toggle>
             <ngx-mat-datetime-picker #slotStartPicker></ngx-mat-datetime-picker>
@@ -100,7 +100,7 @@
           </mat-form-field>
 
           <mat-form-field>
-            <input matInput [ngxMatDatetimePicker]="slotEndPicker" formControlName="end"
+            <input matInput [ngxMatDatetimePicker]="slotEndPicker" readonly formControlName="end"
               placeholder="{{'borrow.items.slot.end' | i18n}}">
             <mat-datepicker-toggle matSuffix [for]="slotEndPicker"></mat-datepicker-toggle>
             <ngx-mat-datetime-picker #slotEndPicker></ngx-mat-datetime-picker>
diff --git a/src/app/pages/borrow/requests/request.edit.html b/src/app/pages/borrow/requests/request.edit.html
index c3bc44c..f890546 100644
--- a/src/app/pages/borrow/requests/request.edit.html
+++ b/src/app/pages/borrow/requests/request.edit.html
@@ -23,7 +23,7 @@
 
   <form [formGroup]="form">
     <mat-form-field>
-      <input matInput [ngxMatDatetimePicker]="startPicker" formControlName="start"
+      <input matInput [ngxMatDatetimePicker]="startPicker" readonly formControlName="start"
         placeholder="{{'borrow.request.start' | i18n}}">
       <mat-datepicker-toggle matSuffix [for]="startPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #startPicker></ngx-mat-datetime-picker>
@@ -33,7 +33,7 @@
     </mat-form-field>
 
     <mat-form-field>
-      <input matInput [ngxMatDatetimePicker]="endPicker" formControlName="end"
+      <input matInput [ngxMatDatetimePicker]="endPicker" readonly formControlName="end"
         placeholder="{{'borrow.request.end' | i18n}}">
       <mat-datepicker-toggle matSuffix [for]="endPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #endPicker></ngx-mat-datetime-picker>
diff --git a/src/app/pages/jitsi/jitsi.component.html b/src/app/pages/jitsi/jitsi.component.html
index 9a5a803..f3b4b86 100644
--- a/src/app/pages/jitsi/jitsi.component.html
+++ b/src/app/pages/jitsi/jitsi.component.html
@@ -107,7 +107,7 @@
         </mat-form-field>
 
         <mat-form-field>
-          <input matInput [ngxMatDatetimePicker]="startsPicker" [(ngModel)]="jitsiRoom.starts" formControlName="starts"
+          <input matInput [ngxMatDatetimePicker]="startsPicker" readonly [(ngModel)]="jitsiRoom.starts" formControlName="starts"
             placeholder="{{'jitsi.rooms.starts' | i18n}}" (dateChange)="clearModeration(jitsiRoom)">
           <mat-datepicker-toggle matSuffix [for]="startsPicker"></mat-datepicker-toggle>
           <ngx-mat-datetime-picker #startsPicker></ngx-mat-datetime-picker>
@@ -117,7 +117,7 @@
         </mat-form-field>
 
         <mat-form-field *ngIf="jitsiRoom.starts">
-          <input matInput [ngxMatDatetimePicker]="moderationStartsPicker" [(ngModel)]="jitsiRoom.moderationStarts"
+          <input matInput [ngxMatDatetimePicker]="moderationStartsPicker" readonly [(ngModel)]="jitsiRoom.moderationStarts"
             formControlName="moderationStarts" placeholder="{{'jitsi.rooms.moderationStarts' | i18n}}">
           <mat-datepicker-toggle matSuffix [for]="moderationStartsPicker"></mat-datepicker-toggle>
           <ngx-mat-datetime-picker #moderationStartsPicker></ngx-mat-datetime-picker>
@@ -127,7 +127,7 @@
         </mat-form-field>
 
         <mat-form-field>
-          <input matInput [ngxMatDatetimePicker]="expiresPicker" [(ngModel)]="jitsiRoom.expires"
+          <input matInput [ngxMatDatetimePicker]="expiresPicker" readonly [(ngModel)]="jitsiRoom.expires"
             formControlName="expires" placeholder="{{'jitsi.rooms.expires' | i18n}}">
           <mat-datepicker-toggle matSuffix [for]="expiresPicker"></mat-datepicker-toggle>
           <ngx-mat-datetime-picker #expiresPicker></ngx-mat-datetime-picker>
diff --git a/src/app/pages/jitsi/jitsi.edit.html b/src/app/pages/jitsi/jitsi.edit.html
index 5c978fe..70f6f0f 100644
--- a/src/app/pages/jitsi/jitsi.edit.html
+++ b/src/app/pages/jitsi/jitsi.edit.html
@@ -12,7 +12,7 @@
     </mat-form-field>
 
     <mat-form-field>
-      <input matInput [ngxMatDatetimePicker]="startsPicker" [(ngModel)]="jitsiRoom.starts" formControlName="starts"
+      <input matInput [ngxMatDatetimePicker]="startsPicker" readonly [(ngModel)]="jitsiRoom.starts" formControlName="starts"
         placeholder="{{'jitsi.rooms.starts' | i18n}}" (dateChange)="clearModeration(jitsiRoom)">
       <mat-datepicker-toggle matSuffix [for]="startsPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #startsPicker></ngx-mat-datetime-picker>
@@ -22,7 +22,7 @@
     </mat-form-field>
 
     <mat-form-field *ngIf="jitsiRoom.starts">
-      <input matInput [ngxMatDatetimePicker]="moderationStartsPicker" [(ngModel)]="jitsiRoom.moderationStarts"
+      <input matInput [ngxMatDatetimePicker]="moderationStartsPicker" readonly [(ngModel)]="jitsiRoom.moderationStarts"
         formControlName="moderationStarts" placeholder="{{'jitsi.rooms.moderationStarts' | i18n}}">
       <mat-datepicker-toggle matSuffix [for]="moderationStartsPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #moderationStartsPicker></ngx-mat-datetime-picker>
@@ -32,7 +32,7 @@
     </mat-form-field>
 
     <mat-form-field>
-      <input matInput [ngxMatDatetimePicker]="expiresPicker" [(ngModel)]="jitsiRoom.expires" formControlName="expires"
+      <input matInput [ngxMatDatetimePicker]="expiresPicker" readonly [(ngModel)]="jitsiRoom.expires" formControlName="expires"
         placeholder="{{'jitsi.rooms.expires' | i18n}}">
       <mat-datepicker-toggle matSuffix [for]="expiresPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #expiresPicker></ngx-mat-datetime-picker>
diff --git a/src/app/pages/partey/timeslots/timeslot.dialog.html b/src/app/pages/partey/timeslots/timeslot.dialog.html
index 8cf64b2..7c5df07 100644
--- a/src/app/pages/partey/timeslots/timeslot.dialog.html
+++ b/src/app/pages/partey/timeslots/timeslot.dialog.html
@@ -17,7 +17,7 @@
       <textarea [mat-autosize] matInput [value]="timeslot.secret" readonly placeholder="{{'partey.timeslots.secret' | i18n}}"></textarea>
     </mat-form-field>
     <mat-form-field>
-      <input matInput [ngxMatDatetimePicker]="startsPicker" [(ngModel)]="timeslot.starts" formControlName="starts"
+      <input matInput [ngxMatDatetimePicker]="startsPicker" readonly [(ngModel)]="timeslot.starts" formControlName="starts"
         placeholder="{{'partey.timeslots.starts' | i18n}}">
       <mat-datepicker-toggle matSuffix [for]="startsPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #startsPicker></ngx-mat-datetime-picker>
@@ -26,7 +26,7 @@
       </mat-error>
     </mat-form-field>
     <mat-form-field>
-      <input matInput [ngxMatDatetimePicker]="endsPicker" [(ngModel)]="timeslot.ends" formControlName="ends"
+      <input matInput [ngxMatDatetimePicker]="endsPicker" readonly [(ngModel)]="timeslot.ends" formControlName="ends"
         placeholder="{{'partey.timeslots.ends' | i18n}}">
       <mat-datepicker-toggle matSuffix [for]="endsPicker"></mat-datepicker-toggle>
       <ngx-mat-datetime-picker #endsPicker></ngx-mat-datetime-picker>
diff --git a/src/app/pages/urlshortener/urlshortener.component.html b/src/app/pages/urlshortener/urlshortener.component.html
index 9ae34a8..86c64e0 100644
--- a/src/app/pages/urlshortener/urlshortener.component.html
+++ b/src/app/pages/urlshortener/urlshortener.component.html
@@ -124,7 +124,7 @@
           </mat-form-field>
 
           <mat-form-field>
-            <input matInput [ngxMatDatetimePicker]="expiresPicker" [(ngModel)]="shortenedUrl.expires"
+            <input matInput [ngxMatDatetimePicker]="expiresPicker" readonly [(ngModel)]="shortenedUrl.expires"
               formControlName="expires" placeholder="{{'urlshortener.expires' | i18n}}">
             <mat-datepicker-toggle matSuffix [for]="expiresPicker"></mat-datepicker-toggle>
             <ngx-mat-datetime-picker #expiresPicker></ngx-mat-datetime-picker>
diff --git a/src/app/pages/urlshortener/urlshortener.edit.html b/src/app/pages/urlshortener/urlshortener.edit.html
index d0ec7f7..40be34c 100644
--- a/src/app/pages/urlshortener/urlshortener.edit.html
+++ b/src/app/pages/urlshortener/urlshortener.edit.html
@@ -49,7 +49,7 @@
       </mat-form-field>
 
       <mat-form-field>
-        <input matInput [ngxMatDatetimePicker]="expiresPicker" [(ngModel)]="shortenedUrlModel.expires"
+        <input matInput [ngxMatDatetimePicker]="expiresPicker" readonly [(ngModel)]="shortenedUrlModel.expires"
           formControlName="expires" placeholder="{{'urlshortener.expires' | i18n}}">
         <mat-datepicker-toggle matSuffix [for]="expiresPicker"></mat-datepicker-toggle>
         <ngx-mat-datetime-picker #expiresPicker></ngx-mat-datetime-picker>
diff --git a/src/app/ui/profilefields/profilefield.dialog.html b/src/app/ui/profilefields/profilefield.dialog.html
index 27d8614..f335593 100644
--- a/src/app/ui/profilefields/profilefield.dialog.html
+++ b/src/app/ui/profilefields/profilefield.dialog.html
@@ -38,7 +38,7 @@
         </mat-error>
       </mat-form-field>
       <mat-form-field *ngSwitchCase="'DATETIME'">
-        <input matInput [ngxMatDatetimePicker]="datetimePicker" [(ngModel)]="profileField.value" formControlName="value"
+        <input matInput [ngxMatDatetimePicker]="datetimePicker" readonly [(ngModel)]="profileField.value" formControlName="value"
           placeholder="{{'profileField.value' | i18n}}">
         <mat-datepicker-toggle matSuffix [for]="datetimePicker"></mat-datepicker-toggle>
         <ngx-mat-datetime-picker #datetimePicker></ngx-mat-datetime-picker>