diff --git a/src/calendar.ts b/src/calendar.ts
index 948544ec7..f3ec48cb3 100644
--- a/src/calendar.ts
+++ b/src/calendar.ts
@@ -383,7 +383,7 @@ export class Calendar {
         };
       }
 
-      content.push(`<div class="event py-4" data-start="${event.DTSTART}" data-end="${event.DTEND}" data-noc="${event._NOCS.join(",")}">`);
+      content.push(`<div class="event py-4" data-start="${event.DTSTART}" data-end="${event.DTEND}" data-noc="${event._NOCS.sort().join(",")}">`);
       content.push(" <div class=\"time w-1/4 align-top text-right inline-block text-5xl text-center tabular-nums pr-2 border-r border-slate-900/10\">__:__</div>");
       content.push(" <div class=\"w-3/5 align-top inline-block text-black pl-2\">");
       content.push("   <div class=\"text-2xl\">");