diff --git a/components/EventsPageSection.tsx b/components/EventsPageSection.tsx
index 5d1c581..202b2e0 100644
--- a/components/EventsPageSection.tsx
+++ b/components/EventsPageSection.tsx
@@ -201,9 +201,13 @@ export default function EventsPageSection({
 
   const getFirstDayOfMonth = (date: Date) => {
     // Utiliser UTC pour correspondre au format des événements
+    // getUTCDay() retourne 0 (dimanche) à 6 (samedi)
+    // On convertit pour que lundi = 0, mardi = 1, ..., dimanche = 6
     const year = date.getUTCFullYear();
     const month = date.getUTCMonth();
-    return new Date(Date.UTC(year, month, 1)).getUTCDay();
+    const dayOfWeek = new Date(Date.UTC(year, month, 1)).getUTCDay();
+    // Convertir : dimanche (0) -> 6, lundi (1) -> 0, mardi (2) -> 1, etc.
+    return (dayOfWeek + 6) % 7;
   };
 
   const formatMonthYear = (date: Date) => {
@@ -238,12 +242,9 @@ export default function EventsPageSection({
         <div className="flex items-center justify-between mb-3">
           <button
             onClick={() => {
-              setCurrentMonth(
-                new Date(
-                  currentMonth.getFullYear(),
-                  currentMonth.getMonth() - 1
-                )
-              );
+              const year = currentMonth.getUTCFullYear();
+              const month = currentMonth.getUTCMonth();
+              setCurrentMonth(new Date(Date.UTC(year, month - 1, 1)));
             }}
             className="px-2 py-1 border border-pixel-gold/50 text-pixel-gold hover:bg-pixel-gold/10 rounded transition text-sm"
           >
@@ -254,12 +255,9 @@ export default function EventsPageSection({
           </h3>
           <button
             onClick={() => {
-              setCurrentMonth(
-                new Date(
-                  currentMonth.getFullYear(),
-                  currentMonth.getMonth() + 1
-                )
-              );
+              const year = currentMonth.getUTCFullYear();
+              const month = currentMonth.getUTCMonth();
+              setCurrentMonth(new Date(Date.UTC(year, month + 1, 1)));
             }}
             className="px-2 py-1 border border-pixel-gold/50 text-pixel-gold hover:bg-pixel-gold/10 rounded transition text-sm"
           >
@@ -269,7 +267,7 @@ export default function EventsPageSection({
 
         {/* Jours de la semaine */}
         <div className="grid grid-cols-7 gap-0.5 mb-1">
-          {["Dim", "Lun", "Mar", "Mer", "Jeu", "Ven", "Sam"].map((day) => (
+          {["Lun", "Mar", "Mer", "Jeu", "Ven", "Sam", "Dim"].map((day) => (
             <div
               key={day}
               className="text-center text-[10px] text-gray-400 font-semibold py-1"