diff --git a/app/src/main/java/com/android/unio/ui/components/EventEditComponents.kt b/app/src/main/java/com/android/unio/ui/components/EventEditComponents.kt
index d16f74fc3..424dbd2bc 100644
--- a/app/src/main/java/com/android/unio/ui/components/EventEditComponents.kt
+++ b/app/src/main/java/com/android/unio/ui/components/EventEditComponents.kt
@@ -41,6 +41,7 @@ import androidx.compose.material3.rememberTimePickerState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -97,15 +98,28 @@ fun NominatimLocationPicker(
   var showDropdown by remember { mutableStateOf(false) }
 
   var shouldDisplayInitialLocation by remember { mutableStateOf(true) }
+  var selectedLocation by remember { mutableStateOf(initialLocation) }
+  val isError by remember {
+    derivedStateOf {
+      selectedLocation == null || selectedLocation!!.name.isEmpty() && locationQuery.isEmpty()
+    }
+  }
 
   Box(modifier = Modifier.fillMaxWidth()) {
     OutlinedTextField(
         value = if (shouldDisplayInitialLocation) initialLocation?.name ?: "" else locationQuery,
         onValueChange = {
           locationSearchViewModel.setQuery(it)
+          selectedLocation = null
           shouldDisplayInitialLocation = false
           showDropdown = true
         },
+        isError = isError,
+        supportingText = {
+          if (isError) {
+            Text(context.getString(R.string.event_edit_location_error))
+          }
+        },
         label = { Text(context.getString(R.string.event_creation_location_label)) },
         placeholder = { Text(context.getString(R.string.event_creation_location_input_label)) },
         modifier = Modifier.fillMaxWidth().testTag(textFieldTestTag))
@@ -129,6 +143,7 @@ fun NominatimLocationPicker(
                 },
                 onClick = {
                   locationSearchViewModel.setQuery(location.name)
+                  selectedLocation = location
                   onLocationSelected(location)
                   showDropdown = false
                 },
@@ -271,6 +286,12 @@ fun DateAndTimePicker(
                 ?: "",
         readOnly = true,
         onValueChange = {},
+        isError = selectedDate == null && initialDate == null,
+        supportingText = {
+          if (selectedDate == null && initialDate == null) {
+            Text(context.getString(R.string.event_edit_date_error))
+          }
+        },
         trailingIcon = {
           Icon(
               Icons.Default.DateRange,
@@ -299,6 +320,12 @@ fun DateAndTimePicker(
                 ?: "",
         readOnly = true,
         onValueChange = {},
+        isError = selectedTime == null && initialTime == null,
+        supportingText = {
+          if (selectedTime == null && initialTime == null) {
+            Text(context.getString(R.string.event_edit_time_error))
+          }
+        },
         trailingIcon = {
           Icon(
               Icons.Default.AccessTime,
diff --git a/app/src/main/java/com/android/unio/ui/event/EventCreation.kt b/app/src/main/java/com/android/unio/ui/event/EventCreation.kt
index a6f1c2ba7..cad4d1ded 100644
--- a/app/src/main/java/com/android/unio/ui/event/EventCreation.kt
+++ b/app/src/main/java/com/android/unio/ui/event/EventCreation.kt
@@ -119,6 +119,12 @@ fun EventCreationScreen(
           OutlinedTextField(
               modifier = Modifier.fillMaxWidth().testTag(EventCreationTestTags.EVENT_TITLE),
               value = name,
+              isError = name.isEmpty(),
+              supportingText = {
+                if (name.isEmpty()) {
+                  Text(context.getString(R.string.event_creation_name_error))
+                }
+              },
               onValueChange = {
                 if (Utils.checkInputLength(it, TextLength.SMALL)) {
                   name = it
@@ -144,6 +150,12 @@ fun EventCreationScreen(
           OutlinedTextField(
               modifier = Modifier.fillMaxWidth().testTag(EventCreationTestTags.SHORT_DESCRIPTION),
               value = shortDescription,
+              isError = shortDescription.isEmpty(),
+              supportingText = {
+                if (shortDescription.isEmpty()) {
+                  Text(context.getString(R.string.event_creation_short_description_error))
+                }
+              },
               onValueChange = {
                 if (Utils.checkInputLength(it, TextLength.MEDIUM)) {
                   shortDescription = it
@@ -197,6 +209,12 @@ fun EventCreationScreen(
           OutlinedTextField(
               modifier = Modifier.fillMaxWidth().testTag(EventCreationTestTags.DESCRIPTION),
               value = longDescription,
+              isError = longDescription.isEmpty(),
+              supportingText = {
+                if (longDescription.isEmpty()) {
+                  Text(context.getString(R.string.event_creation_description_error))
+                }
+              },
               onValueChange = {
                 if (Utils.checkInputLength(it, TextLength.LARGE)) {
                   longDescription = it
diff --git a/app/src/main/java/com/android/unio/ui/event/EventEdit.kt b/app/src/main/java/com/android/unio/ui/event/EventEdit.kt
index 7f26a2afb..e76a4ad7c 100644
--- a/app/src/main/java/com/android/unio/ui/event/EventEdit.kt
+++ b/app/src/main/java/com/android/unio/ui/event/EventEdit.kt
@@ -83,9 +83,9 @@ fun EventEditScreen(
 
   val eventToEdit = remember { eventViewModel.selectedEvent.value!! }
 
-  var name by remember { mutableStateOf(eventToEdit.title) }
-  var shortDescription by remember { mutableStateOf(eventToEdit.catchyDescription) }
-  var longDescription by remember { mutableStateOf(eventToEdit.description) }
+  var name by remember { mutableStateOf(eventToEdit.title.trim()) }
+  var shortDescription by remember { mutableStateOf(eventToEdit.catchyDescription.trim()) }
+  var longDescription by remember { mutableStateOf(eventToEdit.description.trim()) }
 
   var coauthorsAndBoolean =
       associationViewModel.associations.collectAsState().value.map {
@@ -139,12 +139,24 @@ fun EventEditScreen(
           OutlinedTextField(
               modifier = Modifier.fillMaxWidth().testTag(EventEditTestTags.EVENT_TITLE),
               value = name,
+              isError = name.isEmpty(),
+              supportingText = {
+                if (name.isEmpty()) {
+                  Text(context.getString(R.string.event_creation_name_error))
+                }
+              },
               onValueChange = { name = it },
               label = { Text(context.getString(R.string.event_creation_name_label)) })
 
           OutlinedTextField(
               modifier = Modifier.fillMaxWidth().testTag(EventEditTestTags.SHORT_DESCRIPTION),
               value = shortDescription,
+              isError = shortDescription.isEmpty(),
+              supportingText = {
+                if (shortDescription.isEmpty()) {
+                  Text(context.getString(R.string.event_creation_short_description_error))
+                }
+              },
               onValueChange = { shortDescription = it },
               label = { Text(context.getString(R.string.event_creation_short_description_label)) })
 
@@ -178,6 +190,12 @@ fun EventEditScreen(
           OutlinedTextField(
               modifier = Modifier.fillMaxWidth().testTag(EventEditTestTags.DESCRIPTION),
               value = longDescription,
+              isError = longDescription.isEmpty(),
+              supportingText = {
+                if (longDescription.isEmpty()) {
+                  Text(context.getString(R.string.event_creation_description_error))
+                }
+              },
               onValueChange = { longDescription = it },
               label = { Text(context.getString(R.string.event_creation_description_label)) })
 
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index f25249eaa..4a73650a3 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -210,6 +210,9 @@
     <string name="event_creation_location_input_label">Entrez une addresse</string>
     <string name="event_creation_location_dropdown_points">…</string>
     <string name="event_creation_location_dropdown_more">Plus…</string>
+    <string name="event_creation_name_error">Entrez un nom d\'événement</string>
+    <string name="event_creation_short_description_error">Entrez une courte description de l\'événement</string>
+    <string name="event_creation_description_error">Entrez une description de l\'événement</string>
 
     <!-- Event Edit Strings -->
     <string name="event_edit_title">Modifier </string>
@@ -220,6 +223,9 @@
     <!-- Event Edit Component Strings -->
     <string name="event_edit_date_picker_desc">Sélectionner une date</string>
     <string name="event_edit_time_picker_desc">Sélectionner une heure</string>
+    <string name="event_edit_date_error">La date est manquante</string>
+    <string name="event_edit_time_error">L\'heure est manquante</string>
+    <string name="event_edit_location_error">Localisation erronée</string>
     <string name="event_edit_toast_more_button">Continuez à taper pour voir plus de résultats</string>
 
     <!-- Associations Overlay Strings -->
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 4926a2889..5f70620c5 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -214,6 +214,9 @@
     <string name="event_creation_location_input_label">Enter an address</string>
     <string name="event_creation_location_dropdown_points">…</string>
     <string name="event_creation_location_dropdown_more">More…</string>
+    <string name="event_creation_name_error">Enter an event name</string>
+    <string name="event_creation_short_description_error">Enter an event short description</string>
+    <string name="event_creation_description_error">Enter an event description</string>
 
     <!-- Event Edit Strings -->
     <string name="event_edit_title">Edit </string>
@@ -224,6 +227,9 @@
     <!-- Event Edit Component Strings -->
     <string name="event_edit_date_picker_desc">Select date</string>
     <string name="event_edit_time_picker_desc">Select time</string>
+    <string name="event_edit_date_error">Date is missing</string>
+    <string name="event_edit_time_error">Time is missing</string>
+    <string name="event_edit_location_error">Wrong location input</string>
     <string name="event_edit_toast_more_button">Continue typing to see more results</string>
 
     <!-- Associations Overlay Strings -->