From 64f3bd94d741fd7226c4b79ac41842949bcdb16f Mon Sep 17 00:00:00 2001
From: Daniel Bisgrove <daniel@bizz-websites.com>
Date: Wed, 19 Jun 2024 13:33:10 -0400
Subject: [PATCH] Return "invalid date" when date is not formatted correctly.
 Stopping the blank screen error

---
 src/lib/intlFormat.test.ts |  8 ++++++++
 src/lib/intlFormat.ts      | 10 +++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/lib/intlFormat.test.ts b/src/lib/intlFormat.test.ts
index f204d96a5..a94e4b0f1 100644
--- a/src/lib/intlFormat.test.ts
+++ b/src/lib/intlFormat.test.ts
@@ -185,6 +185,14 @@ describe('intlFormat', () => {
 
       expect(date).toBeNull();
     });
+
+    it('returns if month is null', () => {
+      const date = dateFromParts(0, 0, 2000, locale);
+
+      expect(date).toBe(
+        'Invalid Date - you specified 0 (of type number) as a month, which is invalid',
+      );
+    });
   });
   //this test often fails locally. It passes on github.
   describe('dateTimeFormat', () => {
diff --git a/src/lib/intlFormat.ts b/src/lib/intlFormat.ts
index cb9dafaa0..8b19e27b2 100644
--- a/src/lib/intlFormat.ts
+++ b/src/lib/intlFormat.ts
@@ -89,8 +89,16 @@ export const dateFromParts = (
   }
 
   if (typeof year === 'number') {
-    return dateFormat(DateTime.local(year, month, day), locale);
+    const date = DateTime.local(year, month, day);
+    if (date.invalidReason || date.invalidExplanation) {
+      return `Invalid Date - ${date.invalidExplanation}`;
+    }
+    return dateFormat(date, locale);
   } else {
+    const date = DateTime.local().set({ month, day });
+    if (date.invalidReason || date.invalidExplanation) {
+      return `Invalid Date - ${date.invalidExplanation}`;
+    }
     return dayMonthFormat(day, month, locale);
   }
 };