From c95b6a7607509eac90ef91420538fca8b0468fbb Mon Sep 17 00:00:00 2001
From: Shahzaib Ali <shahzaibalihassan@gmail.com>
Date: Thu, 11 Dec 2025 21:55:28 +0500
Subject: [PATCH] [Bug]: Invalid leap day (2100-02-29) accepted and converted
 to timestamp.

---
 client/src/pages/tools/date-converter.tsx | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/client/src/pages/tools/date-converter.tsx b/client/src/pages/tools/date-converter.tsx
index 67135cc3..01a01d46 100644
--- a/client/src/pages/tools/date-converter.tsx
+++ b/client/src/pages/tools/date-converter.tsx
@@ -183,6 +183,17 @@ export default function DateConverter() {
 
     // Try standard date parsing
     const date = new Date(input);
+    if (/^\d{4}-\d{2}-\d{2}$/.test(input)) {
+      const [y, m, d] = input.split("-").map(Number);
+
+      if (
+        date.getUTCFullYear() !== y ||
+        date.getUTCMonth() + 1 !== m ||
+        date.getUTCDate() !== d
+      ) {
+        return null;
+      }
+    }
     return isNaN(date.getTime()) ? null : date;
   };