diff --git a/src/app/event-form/event-form.component.html b/src/app/event-form/event-form.component.html
index 18d7cc7..170ba9f 100644
--- a/src/app/event-form/event-form.component.html
+++ b/src/app/event-form/event-form.component.html
@@ -129,6 +129,9 @@
                [autoClose]="true"
                [restoreFocus]="true"
                [minDate]="form.controls.start_date ? form.controls.start_date.value : undefined"/>
+        <p class="small">
+          {{"date_explanation" | translate}}
+        </p>
       </div>
       <div class="col-3">
       <span
diff --git a/src/assets/i18n/en.json b/src/assets/i18n/en.json
index 4293086..6d1bfa9 100644
--- a/src/assets/i18n/en.json
+++ b/src/assets/i18n/en.json
@@ -1,4 +1,5 @@
 {
+    "date_explanation": "For Competitions use the first and last day of the Competition (C1 and C4) as start and end date.",
     "closing_date": "Closing date",
     "closing_date_explanation": "Optional date to end positions and close other WorldSkills applications."
 }