diff --git a/create-node-meeting-artifacts.mjs b/create-node-meeting-artifacts.mjs
index 860a218..0af5267 100644
--- a/create-node-meeting-artifacts.mjs
+++ b/create-node-meeting-artifacts.mjs
@@ -26,6 +26,8 @@ program
   .parse(process.argv);
 
 // Step 1: Application configuration
+process.env.TZ = 'UTC';
+
 /** @type {import('./src/types').AppConfig} */
 const config = {
   ...environmentConfig,
diff --git a/src/calendar.mjs b/src/calendar.mjs
index aa4112e..c1282ec 100644
--- a/src/calendar.mjs
+++ b/src/calendar.mjs
@@ -42,7 +42,7 @@ export const findNextMeetingDate = async (allEvents, { properties }) => {
 
   for (const event of filteredEvents) {
     // Get all recurrences in our timeframe
-    event.rrule.options.tzid = event.tzid;
+    event.rrule.options.tzid = event.start?.tz;
     const duringOurTimeframe = event.rrule.between(weekStart, weekEnd);
 
     if (duringOurTimeframe.length > 0) {