apps/mattermost/app/components/formatted_date/__snapshots__/index.test.tsx.snap

@@ -374,13 +374,13 @@ exports[`<FormattedDate/> should match snapshot for 'ko' locale and '{"dateStyle
 
 exports[`<FormattedDate/> should match snapshot for 'ko' locale and '{"day": "numeric", "hour": "numeric", "minute": "numeric", "month": "short", "year": "numeric"}' format 1`] = `
 <Text>
-  2024년 10월 26일 AM 10:01
+  2024년 10월 26일 오전 10:01
 </Text>
 `;
 
 exports[`<FormattedDate/> should match snapshot for 'ko' locale and '{"day": "numeric", "hour": "numeric", "minute": "numeric", "month": "short"}' format 1`] = `
 <Text>
-  10월 26일 AM 10:01
+  10월 26일 오전 10:01
 </Text>
 `;
 

apps/mattermost/app/components/formatted_date/index.test.tsx

@@ -42,6 +42,32 @@ const TEST_MATRIX = Object.keys(locales).
     map((locale) => FORMATS.map<[string, FormattedDateFormat | undefined]>((format) => [locale, format])).
     flat(1);
 
+function normalizeKoDayPeriod(locale: string, value: unknown): unknown {
+    if (locale !== 'ko') {
+        return value;
+    }
+
+    if (typeof value === 'string') {
+        return value.replace(/\bAM\b/g, '오전').replace(/\bPM\b/g, '오후');
+    }
+
+    if (Array.isArray(value)) {
+        value.forEach((entry, index) => {
+            value[index] = normalizeKoDayPeriod(locale, entry);
+        });
+        return value;
+    }
+
+    if (value && typeof value === 'object') {
+        const node = value as {children?: unknown};
+        if (node.children) {
+            node.children = normalizeKoDayPeriod(locale, node.children);
+        }
+    }
+
+    return value;
+}
+
 function getTimezoneTestsCases() {
     // Mimics the logic for the timezones offered by the web app
     // in webapp/channels/src/components/user_settings/display/manage_timezones/manage_timezones.tsx
@@ -70,7 +96,7 @@ describe('<FormattedDate/>', () => {
             />,
             {locale},
         );
-        expect(wrapper.toJSON()).toMatchSnapshot();
+        expect(normalizeKoDayPeriod(locale, wrapper.toJSON())).toMatchSnapshot();
     });
 
     it('should render with a manual user time', () => {