diff --git a/backend/src/db/migrations/20231017141022-fix-event-dates.ts b/backend/src/db/migrations/20231017141022-fix-event-dates.ts
new file mode 100644
index 000000000..d3a28afde
--- /dev/null
+++ b/backend/src/db/migrations/20231017141022-fix-event-dates.ts
@@ -0,0 +1,68 @@
+import { getDriver } from '../../db/neo4j'
+
+export const description = `
+Transform event start and end date of format 'YYYY-MM-DD HH:MM:SS' in CEST
+to ISOString in UTC.
+`
+
+export async function up(next) {
+  const driver = getDriver()
+  const session = driver.session()
+  const transaction = session.beginTransaction()
+
+  try {
+    const events = await transaction.run(`
+      MATCH (event:Event)
+      WHERE NOT event.eventStart CONTAINS 'T'
+      RETURN event.id, event.eventStart, event.eventEnd
+    `)
+    for (const event of events.records) {
+      let [id, eventStart, eventEnd] = event
+      let date = new Date(eventStart)
+      date.setHours(date.getHours() - 2)
+      eventStart = date.toISOString()
+      if (eventEnd) {
+        date = new Date(eventEnd)
+        date.setHours(date.getHours() - 2)
+        eventEnd = date.toISOString()
+      }
+      await transaction.run(`
+        MATCH (e:Event { id: '${id}' })
+        SET e.eventStart = '${eventStart}'
+        SET (CASE WHEN e.eventEnd THEN e END).eventEnd = '${eventEnd}'
+        RETURN e
+      `)
+    }
+    await transaction.commit()
+    next()
+  } catch (error) {
+    // eslint-disable-next-line no-console
+    console.log(error)
+    await transaction.rollback()
+    // eslint-disable-next-line no-console
+    console.log('rolled back')
+    throw new Error(error)
+  } finally {
+    session.close()
+  }
+}
+
+export async function down(next) {
+  const driver = getDriver()
+  const session = driver.session()
+  const transaction = session.beginTransaction()
+
+  try {
+    // No sense in running this down
+    next()
+  } catch (error) {
+    // eslint-disable-next-line no-console
+    console.log(error)
+    await transaction.rollback()
+    // eslint-disable-next-line no-console
+    console.log('rolled back')
+    throw new Error(error)
+  } finally {
+    session.close()
+  }
+}