Preserve year-only Date Issued values

frontend/src/__tests__/components/resource/FullDetailsTable.test.tsx

@@ -264,6 +264,42 @@ describe('FullDetailsTable', () => {
     expect(screen.getByText('Restricted')).toBeInTheDocument();
   });
 
+  it('preserves a year-only Date Issued value', () => {
+    const data = {
+      ...baseData,
+      attributes: {
+        ...baseData.attributes,
+        ogm: {
+          ...baseData.attributes.ogm,
+          dct_issued_s: '1950',
+        },
+      },
+    };
+
+    renderWithRouter(<FullDetailsTable data={data} />);
+
+    expect(screen.getByText('Date Issued')).toBeInTheDocument();
+    expect(screen.getByText('1950')).toBeInTheDocument();
+    expect(screen.queryByText('January 1, 1950')).not.toBeInTheDocument();
+  });
+
+  it('formats a full Date Issued value with month and day', () => {
+    const data = {
+      ...baseData,
+      attributes: {
+        ...baseData.attributes,
+        ogm: {
+          ...baseData.attributes.ogm,
+          dct_issued_s: '2019-01-15',
+        },
+      },
+    };
+
+    renderWithRouter(<FullDetailsTable data={data} />);
+
+    expect(screen.getByText('January 15, 2019')).toBeInTheDocument();
+  });
+
   it('metadata facet labels use sequential heading level (h3 under h2)', () => {
     const data = {
       ...baseData,

frontend/src/components/resource/FullDetailsTable.tsx

@@ -360,7 +360,14 @@ export function FullDetailsTable({ data }: FullDetailsTableProps) {
         // IMPORTANT: make this deterministic across SSR/client.
         // Manually parse YYYY-MM-DD to avoid `new Date(string)` ambiguity and timezone offsets.
         // We strictly interpret the date string as UTC YYYY-MM-DD.
-        const valStr = value.toString();
+        const valStr = value.toString().trim();
+
+        // Date Issued often has year-level precision. Preserve that precision instead
+        // of allowing `new Date("2024")` to invent January 1 as a month and day.
+        if (key === 'dct_issued_s' && /^\d{4}$/.test(valStr)) {
+          return valStr;
+        }
+
         // Match YYYY-MM-DD pattern (stripping time if present)
         const match = valStr.match(/^(\d{4})-(\d{2})-(\d{2})/);