diff --git a/frontend/src/__tests__/components/automations/detail/activity-log-item.test.tsx b/frontend/src/__tests__/components/automations/detail/activity-log-item.test.tsx
index a11fd46..9809fd5 100644
--- a/frontend/src/__tests__/components/automations/detail/activity-log-item.test.tsx
+++ b/frontend/src/__tests__/components/automations/detail/activity-log-item.test.tsx
@@ -37,6 +37,17 @@ describe("ActivityLogItem", () => {
     ).toBeInTheDocument();
   });
 
+  it("formats the run timestamp in the automation timezone", () => {
+    const run = createRun();
+    render(<ActivityLogItem run={run} timeZone="America/Los_Angeles" />);
+
+    expect(
+      screen.getByText(
+        (content) => content.includes("2:00 AM") && content.includes("PDT"),
+      ),
+    ).toBeInTheDocument();
+  });
+
   it("renders as a link when conversation_id exists", () => {
     const run = createRun({ conversation_id: "conv-abc123" });
     render(<ActivityLogItem run={run} />);
diff --git a/frontend/src/components/automations/detail/activity-log-item.tsx b/frontend/src/components/automations/detail/activity-log-item.tsx
index 5a92259..e30d68a 100644
--- a/frontend/src/components/automations/detail/activity-log-item.tsx
+++ b/frontend/src/components/automations/detail/activity-log-item.tsx
@@ -5,18 +5,36 @@ import { RunStatusBadge } from "./run-status-badge";
 
 interface ActivityLogItemProps {
   run: AutomationRun;
+  timeZone?: string;
 }
 
-function formatRunTimestamp(dateStr: string, locale: string): string {
+const RUN_TIMESTAMP_OPTIONS: Intl.DateTimeFormatOptions = {
+  weekday: "long",
+  year: "numeric",
+  month: "long",
+  day: "numeric",
+  hour: "numeric",
+  minute: "2-digit",
+};
+
+function formatRunTimestamp(
+  dateStr: string,
+  locale: string,
+  timeZone?: string,
+): string {
   const date = new Date(dateStr);
-  return date.toLocaleDateString(locale, {
-    weekday: "long",
-    year: "numeric",
-    month: "long",
-    day: "numeric",
-    hour: "numeric",
-    minute: "2-digit",
-  });
+  const options: Intl.DateTimeFormatOptions = { ...RUN_TIMESTAMP_OPTIONS };
+
+  if (timeZone) {
+    options.timeZone = timeZone;
+    options.timeZoneName = "short";
+  }
+
+  try {
+    return date.toLocaleDateString(locale, options);
+  } catch {
+    return date.toLocaleDateString(locale, RUN_TIMESTAMP_OPTIONS);
+  }
 }
 
 function getConversationUrl(conversationId: string): string {
@@ -27,16 +45,19 @@ function getConversationUrl(conversationId: string): string {
   return `https://${baseHost}/conversations/${conversationId}`;
 }
 
-export function ActivityLogItem({ run }: ActivityLogItemProps) {
+export function ActivityLogItem({ run, timeZone }: ActivityLogItemProps) {
   const { t, i18n } = useTranslation();
   const hasConversation = !!run.conversation_id;
+  const runTimestamp = formatRunTimestamp(
+    run.started_at,
+    i18n.language,
+    timeZone,
+  );
 
   const content = (
     <>
       <div className="flex items-center gap-3">
-        <span className="text-sm text-content">
-          {formatRunTimestamp(run.started_at, i18n.language)}
-        </span>
+        <span className="text-sm text-content">{runTimestamp}</span>
         {!hasConversation && (
           <span className="text-xs text-content-muted italic">
             ({t(I18nKey.AUTOMATIONS$DETAIL$NO_CONVERSATION)})
@@ -54,7 +75,7 @@ export function ActivityLogItem({ run }: ActivityLogItemProps) {
         target="_blank"
         rel="noopener noreferrer"
         className="flex items-center justify-between px-5 py-3 transition-colors cursor-pointer hover:bg-surface-elevated focus:bg-surface-elevated focus:outline-none"
-        aria-label={`View conversation for run at ${formatRunTimestamp(run.started_at, i18n.language)}`}
+        aria-label={`View conversation for run at ${runTimestamp}`}
       >
         {content}
       </a>
diff --git a/frontend/src/components/automations/detail/activity-log-section.tsx b/frontend/src/components/automations/detail/activity-log-section.tsx
index d2cc801..6b092e2 100644
--- a/frontend/src/components/automations/detail/activity-log-section.tsx
+++ b/frontend/src/components/automations/detail/activity-log-section.tsx
@@ -7,11 +7,15 @@ import { ActivityLogItem } from "./activity-log-item";
 
 interface ActivityLogSectionProps {
   automationId: string;
+  timeZone?: string;
 }
 
 const PAGE_SIZE = 20;
 
-export function ActivityLogSection({ automationId }: ActivityLogSectionProps) {
+export function ActivityLogSection({
+  automationId,
+  timeZone,
+}: ActivityLogSectionProps) {
   const { t } = useTranslation();
   const [limit, setLimit] = useState(PAGE_SIZE);
   const { data, isLoading } = useAutomationRuns(automationId, limit, 0);
@@ -56,7 +60,7 @@ export function ActivityLogSection({ automationId }: ActivityLogSectionProps) {
               key={run.id}
               className={index > 0 ? "border-t border-border" : ""}
             >
-              <ActivityLogItem run={run} />
+              <ActivityLogItem run={run} timeZone={timeZone} />
             </div>
           ))}
 
diff --git a/frontend/src/components/automations/detail/configuration-section.tsx b/frontend/src/components/automations/detail/configuration-section.tsx
index 01081ad..cdd4c76 100644
--- a/frontend/src/components/automations/detail/configuration-section.tsx
+++ b/frontend/src/components/automations/detail/configuration-section.tsx
@@ -20,10 +20,11 @@ export function ConfigurationSection({
 }: ConfigurationSectionProps) {
   const { t } = useTranslation();
 
+  const automationTimeZone = automation.trigger.timezone ?? automation.timezone;
   let scheduleDisplay = automation.trigger.schedule ?? "";
   if (automation.trigger.schedule_human) {
-    scheduleDisplay = automation.timezone
-      ? `${automation.trigger.schedule_human} (${automation.timezone})`
+    scheduleDisplay = automationTimeZone
+      ? `${automation.trigger.schedule_human} (${automationTimeZone})`
       : automation.trigger.schedule_human;
   }
 
diff --git a/frontend/src/routes/automation-detail.tsx b/frontend/src/routes/automation-detail.tsx
index 6db6202..f1ad3e7 100644
--- a/frontend/src/routes/automation-detail.tsx
+++ b/frontend/src/routes/automation-detail.tsx
@@ -64,6 +64,8 @@ export default function AutomationDetail() {
     });
   };
 
+  const automationTimeZone = automation.trigger.timezone ?? automation.timezone;
+
   return (
     <div className="flex flex-col gap-4">
       <BackLink />
@@ -81,7 +83,10 @@ export default function AutomationDetail() {
         createdAt={automation.created_at}
         lastRunAt={automation.last_triggered_at}
       />
-      <ActivityLogSection automationId={automation.id} />
+      <ActivityLogSection
+        automationId={automation.id}
+        timeZone={automationTimeZone}
+      />
       <DeleteConfirmationModal
         automationName={automation.name}
         isOpen={showDeleteModal}
diff --git a/frontend/src/types/automation.ts b/frontend/src/types/automation.ts
index 2b08d7c..2133994 100644
--- a/frontend/src/types/automation.ts
+++ b/frontend/src/types/automation.ts
@@ -2,6 +2,7 @@ export interface AutomationTrigger {
   type: string;
   schedule?: string;
   schedule_human?: string;
+  timezone?: string;
 }
 
 export interface Automation {