diff --git a/docs/cookbook/meetingPlanner.js b/docs/cookbook/meetingPlanner.js
index 7e46c2d80d..c59a5d571c 100644
--- a/docs/cookbook/meetingPlanner.js
+++ b/docs/cookbook/meetingPlanner.js
@@ -2,7 +2,7 @@
 const browserCalendar = new Intl.DateTimeFormat().resolvedOptions().calendar;
 const now = Temporal.Now.zonedDateTime(browserCalendar);
 const timeZones = [
-  { name: 'Here', tz: now.timeZone },
+  { name: 'Here', tz: now.timeZoneId },
   { name: 'New York', tz: 'America/New_York' },
   { name: 'London', tz: 'Europe/London' },
   { name: 'Tokyo', tz: 'Asia/Tokyo' }
diff --git a/docs/cookbook/storageTank.js b/docs/cookbook/storageTank.js
index 708142cab1..a3bae1eb56 100644
--- a/docs/cookbook/storageTank.js
+++ b/docs/cookbook/storageTank.js
@@ -8,7 +8,7 @@ const labelFormatter = new Intl.DateTimeFormat(undefined, {
   weekday: 'short',
   hour: 'numeric',
   minute: 'numeric',
-  timeZone: Temporal.Now.timeZone()
+  timeZone: Temporal.Now.timeZoneId()
 });
 const browserCalendar = labelFormatter.resolvedOptions().calendar;
 const tankMidnight = Temporal.Now.zonedDateTime(browserCalendar).withTimeZone(tankTimeZone).startOfDay().toInstant();