diff --git a/apps/storybook/stories/Review5303Noon.stories.tsx b/apps/storybook/stories/Review5303Noon.stories.tsx
new file mode 100644
index 00000000000..5fb38c9f655
--- /dev/null
+++ b/apps/storybook/stories/Review5303Noon.stories.tsx
@@ -0,0 +1,103 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+/**
+ * @file DateLocaleConsistency.stories.tsx
+ * @input InternationalizationProvider locale plus a fixed Gregorian date
+ * @output Side-by-side French and Thai date-formatting evidence
+ * @position Storybook verification story for shared date semantics
+ */
+
+import {useState} from 'react';
+import type {Meta, StoryObj} from '@storybook/react';
+import * as stylex from '@stylexjs/stylex';
+import {Calendar, type ISODateString} from '@astryxdesign/core/Calendar';
+import {DateInput} from '@astryxdesign/core/DateInput';
+import {
+  InternationalizationProvider,
+  type Locale,
+} from '@astryxdesign/core/i18n';
+import {Heading, Text} from '@astryxdesign/core/Text';
+import {Timestamp} from '@astryxdesign/core/Timestamp';
+import {spacingVars} from '@astryxdesign/core/theme/tokens.stylex';
+import {plainDateFormat} from '@astryxdesign/core/utils';
+
+const meta = {
+  title: 'Review/PR 5303 noon',
+  parameters: {
+    layout: 'padded',
+  },
+} satisfies Meta;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+const DATE = '2026-08-22' as ISODateString;
+
+function LocaleDateExamples({locale}: {locale: Locale}) {
+  const [value, setValue] = useState<ISODateString | undefined>(DATE);
+
+  return (
+    <InternationalizationProvider locale={locale}>
+      <section
+        aria-label={`${locale} date examples`}
+        {...stylex.props(styles.panel)}>
+        <Heading level={2}>{locale}</Heading>
+        <DateInput
+          label="Selected date"
+          value={value}
+          onChange={setValue}
+          format="date_long"
+        />
+        <Text>
+          Timestamp:{' '}
+          <Timestamp value="2026-08-22T12:00:00Z" format="date_long" />
+        </Text>
+        <Text data-testid="explicit-helper">
+          Explicit Buddhist helper:{' '}
+          {plainDateFormat(
+            {year: 2026, month: 8, day: 22},
+            {year: 'numeric', calendar: 'buddhist'},
+            'en-US',
+          )}
+        </Text>
+        <Calendar
+          mode="single"
+          value={value}
+          onChange={setValue}
+          focusDate="2026-08-01"
+        />
+      </section>
+    </InternationalizationProvider>
+  );
+}
+
+export const FrenchAndThaiGregorian: Story = {
+  render: () => (
+    <div {...stylex.props(styles.comparison)}>
+      <LocaleDateExamples locale="fr-FR" />
+      <LocaleDateExamples locale="th-TH" />
+    </div>
+  ),
+  parameters: {
+    docs: {
+      description: {
+        story:
+          'Calendar, DateInput, and Timestamp all follow the provider locale while preserving Gregorian year 2026. Thai must not render Buddhist year 2569.',
+      },
+    },
+  },
+};
+
+const styles = stylex.create({
+  comparison: {
+    display: 'grid',
+    gridTemplateColumns: 'repeat(2, minmax(0, 1fr))',
+    gap: spacingVars['--spacing-8'],
+  },
+  panel: {
+    display: 'flex',
+    flexDirection: 'column',
+    gap: spacingVars['--spacing-4'],
+    minWidth: 0,
+  },
+});