diff --git a/config/database.js b/config/database.js
index b14c76d..780f3cf 100644
--- a/config/database.js
+++ b/config/database.js
@@ -168,8 +168,8 @@ async function initDatabase() {
         user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
         title TEXT NOT NULL,
         description TEXT,
-        start_time TIMESTAMP NOT NULL,
-        end_time TIMESTAMP NOT NULL,
+        start_time TIMESTAMPTZ NOT NULL,
+        end_time TIMESTAMPTZ NOT NULL,
         location TEXT,
         color_id TEXT,
         html_link TEXT,
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 2d027f6..b30abcc 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -75,6 +75,10 @@ else
   echo "✅ PostgreSQL contient déjà des données ($HAS_DATA utilisateurs)"
 fi
 
+echo ""
+echo "🔄 Migration des timezones du calendrier..."
+node scripts/migrate-calendar-timezone.js 2>/dev/null || echo "  ℹ️  Migration timezone déjà effectuée ou non nécessaire"
+
 echo ""
 echo "========================================"
 echo "🚀 Démarrage du serveur NoteFlow..."
diff --git a/migrations/002_calendar_timestamptz.sql b/migrations/002_calendar_timestamptz.sql
new file mode 100644
index 0000000..3bf4dda
--- /dev/null
+++ b/migrations/002_calendar_timestamptz.sql
@@ -0,0 +1,24 @@
+-- Migration: Convertir calendar_events TIMESTAMP → TIMESTAMPTZ
+-- Pour corriger le décalage horaire de 1h dans l'affichage
+
+BEGIN;
+
+-- Convertir start_time de TIMESTAMP à TIMESTAMPTZ
+ALTER TABLE calendar_events
+  ALTER COLUMN start_time TYPE TIMESTAMPTZ
+  USING start_time AT TIME ZONE 'UTC';
+
+-- Convertir end_time de TIMESTAMP à TIMESTAMPTZ
+ALTER TABLE calendar_events
+  ALTER COLUMN end_time TYPE TIMESTAMPTZ
+  USING end_time AT TIME ZONE 'UTC';
+
+COMMIT;
+
+-- Vérification
+SELECT
+  column_name,
+  data_type
+FROM information_schema.columns
+WHERE table_name = 'calendar_events'
+  AND column_name IN ('start_time', 'end_time');
diff --git a/routes/calendar.routes.js b/routes/calendar.routes.js
index b30c180..6251028 100644
--- a/routes/calendar.routes.js
+++ b/routes/calendar.routes.js
@@ -430,7 +430,7 @@ router.post('/sync', authenticateToken, async (req, res) => {
           endTime,
           event.location || '',
           event.htmlLink || '',
-          isAllDay ? 1 : 0,
+          isAllDay,
           existing.id
         ]);
       } else {
@@ -448,7 +448,7 @@ router.post('/sync', authenticateToken, async (req, res) => {
           endTime,
           event.location || '',
           event.htmlLink || '',
-          isAllDay ? 1 : 0
+          isAllDay
         ]);
       }
       syncedCount++;
diff --git a/scripts/migrate-calendar-timezone.js b/scripts/migrate-calendar-timezone.js
new file mode 100755
index 0000000..c87517d
--- /dev/null
+++ b/scripts/migrate-calendar-timezone.js
@@ -0,0 +1,97 @@
+#!/usr/bin/env node
+
+// Migration: Convertir calendar_events TIMESTAMP → TIMESTAMPTZ
+const { Pool } = require('pg');
+
+const DATABASE_URL = process.env.DATABASE_URL;
+
+if (!DATABASE_URL) {
+  console.error('❌ DATABASE_URL non définie');
+  process.exit(1);
+}
+
+async function migrate() {
+  const pool = new Pool({ connectionString: DATABASE_URL });
+
+  try {
+    console.log('\n🔄 Migration: calendar_events TIMESTAMP → TIMESTAMPTZ\n');
+
+    const client = await pool.connect();
+
+    // Vérifier le type actuel
+    const check = await client.query(`
+      SELECT column_name, data_type
+      FROM information_schema.columns
+      WHERE table_name = 'calendar_events'
+        AND column_name IN ('start_time', 'end_time')
+    `);
+
+    console.log('📊 Types actuels:');
+    check.rows.forEach(row => {
+      console.log(`  ${row.column_name}: ${row.data_type}`);
+    });
+
+    // Si déjà TIMESTAMPTZ, skip
+    const alreadyMigrated = check.rows.every(row =>
+      row.data_type.includes('timestamp with time zone') ||
+      row.data_type === 'timestamptz'
+    );
+
+    if (alreadyMigrated) {
+      console.log('\n✅ Migration déjà effectuée, rien à faire');
+      client.release();
+      await pool.end();
+      return;
+    }
+
+    console.log('\n🔄 Conversion en cours...');
+
+    await client.query('BEGIN');
+
+    // Convertir start_time
+    await client.query(`
+      ALTER TABLE calendar_events
+        ALTER COLUMN start_time TYPE TIMESTAMPTZ
+        USING start_time AT TIME ZONE 'UTC'
+    `);
+    console.log('  ✅ start_time → TIMESTAMPTZ');
+
+    // Convertir end_time
+    await client.query(`
+      ALTER TABLE calendar_events
+        ALTER COLUMN end_time TYPE TIMESTAMPTZ
+        USING end_time AT TIME ZONE 'UTC'
+    `);
+    console.log('  ✅ end_time → TIMESTAMPTZ');
+
+    await client.query('COMMIT');
+
+    // Vérifier après migration
+    const verify = await client.query(`
+      SELECT column_name, data_type
+      FROM information_schema.columns
+      WHERE table_name = 'calendar_events'
+        AND column_name IN ('start_time', 'end_time')
+    `);
+
+    console.log('\n📊 Types après migration:');
+    verify.rows.forEach(row => {
+      console.log(`  ${row.column_name}: ${row.data_type}`);
+    });
+
+    console.log('\n✅ Migration terminée avec succès!');
+    console.log('');
+    console.log('📝 Note: Resynchronisez vos événements Google Calendar');
+    console.log('   pour appliquer le nouveau format de timezone.');
+    console.log('');
+
+    client.release();
+    await pool.end();
+
+  } catch (error) {
+    console.error('\n❌ Erreur lors de la migration:', error.message);
+    process.exit(1);
+  }
+}
+
+migrate();