diff --git a/packages/grafana-data/src/datetime/formats.ts b/packages/grafana-data/src/datetime/formats.ts
index 92b9a99db62..67d0e4e6948 100644
--- a/packages/grafana-data/src/datetime/formats.ts
+++ b/packages/grafana-data/src/datetime/formats.ts
@@ -105,7 +105,13 @@ export function localTimeFormat(
   }
 
   // https://momentjs.com/docs/#/displaying/format/
-  const dateTimeFormat = new Intl.DateTimeFormat(locale || undefined, options);
+  let dateTimeFormat: Intl.DateTimeFormat;
+
+  try {
+    dateTimeFormat = new Intl.DateTimeFormat(locale || undefined, options);
+  } catch {
+    dateTimeFormat = new Intl.DateTimeFormat('en-US', options);
+  }
   const parts = dateTimeFormat.formatToParts(new Date());
   const hour12 = dateTimeFormat.resolvedOptions().hour12;
 
diff --git a/packages/grafana-i18n/src/dates.ts b/packages/grafana-i18n/src/dates.ts
index c75cd2c86f4..c942226dfba 100644
--- a/packages/grafana-i18n/src/dates.ts
+++ b/packages/grafana-i18n/src/dates.ts
@@ -11,7 +11,11 @@ function clearMemoizedCache(fn: Memoized<AnyFn>) {
 let regionalFormat: string | undefined;
 
 const createDateTimeFormatter = deepMemoize((locale: string | undefined, options: Intl.DateTimeFormatOptions) => {
-  return new Intl.DateTimeFormat(locale, options);
+  try {
+    return new Intl.DateTimeFormat(locale, options);
+  } catch {
+    return new Intl.DateTimeFormat('en-US', options);
+  }
 });
 
 const createDurationFormatter = deepMemoize((locale: string | undefined, options: Intl.DurationFormatOptions) => {
diff --git a/public/app/core/internationalization/dates.ts b/public/app/core/internationalization/dates.ts
index 8d1e7467a93..9ef7bbbdb82 100644
--- a/public/app/core/internationalization/dates.ts
+++ b/public/app/core/internationalization/dates.ts
@@ -9,7 +9,11 @@ const deepMemoize: typeof memoize = (fn) => memoize(fn, { isEqual: deepEqual });
 const isLocaleEnabled = config.featureToggles.localeFormatPreference;
 
 const createDateTimeFormatter = deepMemoize((locale: string, options: Intl.DateTimeFormatOptions) => {
-  return new Intl.DateTimeFormat(locale, options);
+  try {
+    return new Intl.DateTimeFormat(locale, options);
+  } catch {
+    return new Intl.DateTimeFormat('en-US', options);
+  }
 });
 
 const createDurationFormatter = deepMemoize((locale: string, options: Intl.DurationFormatOptions) => {