diff --git a/src/helpers/newsletterHelper.ts b/src/helpers/newsletterHelper.ts
index 3104359..438f06d 100644
--- a/src/helpers/newsletterHelper.ts
+++ b/src/helpers/newsletterHelper.ts
@@ -61,39 +61,41 @@ export abstract class NewsletterHelper {
       newsletterTitle: newsletter.newsletterTitle,
       newsletterText: newsletter.newsletterText,
       newsletterSignatur: newsletter.newsletterSignatur,
-      dates: dates.map((d) => ({
-        title: d.diffTitle || d.calendar.title,
-        content: d.diffDescription || d.calendar.content,
-        starttime: d.calendar.starttime,
-        formattedStarttime: new Date(d.calendar.starttime).toLocaleDateString("de-DE", {
-          weekday: "long",
-          day: "2-digit",
-          month: "long",
-        }),
-        formattedFullStarttime: new Date(d.calendar.starttime).toLocaleDateString("de-DE", {
-          weekday: "long",
-          day: "2-digit",
-          month: "long",
-          year: "numeric",
-          hour: "2-digit",
-          minute: "2-digit",
-        }),
-        endtime: d.calendar.endtime,
-        formattedEndtime: new Date(d.calendar.endtime).toLocaleDateString("de-DE", {
-          weekday: "long",
-          day: "2-digit",
-          month: "long",
-        }),
-        formattedFullEndtime: new Date(d.calendar.endtime).toLocaleDateString("de-DE", {
-          weekday: "long",
-          day: "2-digit",
-          month: "long",
-          year: "numeric",
-          hour: "2-digit",
-          minute: "2-digit",
-        }),
-        location: d.calendar.location,
-      })),
+      dates: dates
+        .map((d) => ({
+          title: d.diffTitle || d.calendar.title,
+          content: d.diffDescription || d.calendar.content,
+          starttime: d.calendar.starttime,
+          formattedStarttime: new Date(d.calendar.starttime).toLocaleDateString("de-DE", {
+            weekday: "long",
+            day: "2-digit",
+            month: "long",
+          }),
+          formattedFullStarttime: new Date(d.calendar.starttime).toLocaleDateString("de-DE", {
+            weekday: "long",
+            day: "2-digit",
+            month: "long",
+            year: "numeric",
+            hour: "2-digit",
+            minute: "2-digit",
+          }),
+          endtime: d.calendar.endtime,
+          formattedEndtime: new Date(d.calendar.endtime).toLocaleDateString("de-DE", {
+            weekday: "long",
+            day: "2-digit",
+            month: "long",
+          }),
+          formattedFullEndtime: new Date(d.calendar.endtime).toLocaleDateString("de-DE", {
+            weekday: "long",
+            day: "2-digit",
+            month: "long",
+            year: "numeric",
+            hour: "2-digit",
+            minute: "2-digit",
+          }),
+          location: d.calendar.location,
+        }))
+        .sort((a, b) => a.starttime.getTime() - b.starttime.getTime()),
       ...(recipient
         ? {
             recipient: {