diff --git a/modal.js b/modal.js
index 63d6915951..835d62dfb8 100644
--- a/modal.js
+++ b/modal.js
@@ -39,7 +39,6 @@ function validate(e) {
 
   //first name validation
   let firstName = formData[0].getElementsByTagName("input")[0].value;
-  console.log(firstName);
   if (firstName === "") {
     showValidationError(formData[0], "Le prénom est requis");
   } else if (firstName.length < 2) {
@@ -72,6 +71,16 @@ function validate(e) {
     hideValidationError(formData[2]);
   }
 
+  // birthday validation
+  let birthday = formData[3].getElementsByTagName("input")[0].value;
+  console.log(birthday);
+  if (birthday === "") {
+    showValidationError(formData[3], "Veuillez sélectionner une date");
+  } else {
+    // a date is selected
+    hideValidationError(formData[3]);
+  }
+
   // nb of tournaments validation
   let nbOfTournaments = formData[4].getElementsByTagName("input")[0].value;
   if (nbOfTournaments === "") {