diff --git a/src/pages-and-resources/discussions/app-config-form/apps/shared/blackout-dates/BlackoutDatesItem.jsx b/src/pages-and-resources/discussions/app-config-form/apps/shared/blackout-dates/BlackoutDatesItem.jsx
index a2970b120..f2c16cac5 100644
--- a/src/pages-and-resources/discussions/app-config-form/apps/shared/blackout-dates/BlackoutDatesItem.jsx
+++ b/src/pages-and-resources/discussions/app-config-form/apps/shared/blackout-dates/BlackoutDatesItem.jsx
@@ -99,7 +99,7 @@ const BlackoutDatesItem = ({
         <BlackoutDatesInput
           value={blackoutDate.startTime}
           type="time"
-          label={intl.formatMessage(messages.startTimeLabel)}
+          label={intl.formatMessage(messages.startTimeLabel, { zone: 'UTC' })}
           helpText={intl.formatMessage(messages.blackoutStartTimeHelp)}
           fieldName="startTime"
           formGroupClasses="pr-md-0"
@@ -123,7 +123,7 @@ const BlackoutDatesItem = ({
         <BlackoutDatesInput
           value={blackoutDate.endTime}
           type="time"
-          label={intl.formatMessage(messages.endTimeLabel)}
+          label={intl.formatMessage(messages.endTimeLabel, { zone: 'UTC' })}
           helpText={intl.formatMessage(messages.blackoutEndTimeHelp)}
           fieldName="endTime"
           formGroupClasses="pr-md-0"
diff --git a/src/pages-and-resources/discussions/app-config-form/messages.js b/src/pages-and-resources/discussions/app-config-form/messages.js
index 46948977f..1d303a0b0 100644
--- a/src/pages-and-resources/discussions/app-config-form/messages.js
+++ b/src/pages-and-resources/discussions/app-config-form/messages.js
@@ -392,7 +392,7 @@ const messages = defineMessages({
   },
   startTimeLabel: {
     id: 'authoring.blackoutDates.start.time',
-    defaultMessage: 'Start time (optional)',
+    defaultMessage: 'Start time (optional) ({zone})',
     description: 'label for start time field',
   },
   endDateLabel: {
@@ -402,7 +402,7 @@ const messages = defineMessages({
   },
   endTimeLabel: {
     id: 'authoring.blackoutDates.end.time',
-    defaultMessage: 'End time (optional)',
+    defaultMessage: 'End time (optional) ({zone})',
     description: 'label for end time field',
   },
 });