diff --git a/package-lock.json b/package-lock.json
index e631242..6ae4823 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -43,7 +43,6 @@
       "integrity": "sha512-e7jT4DxYvIDLk1ZHmU/m/mB19rex9sv0c2ftBtjSBv+kVM/902eh0fINUzD7UwLLNR+jU585GxUJ8/EBfAM5fw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.27.1",
         "@babel/generator": "^7.28.5",
@@ -1264,7 +1263,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.8.25",
         "caniuse-lite": "^1.0.30001754",
diff --git a/src/engine.js b/src/engine.js
index 4bff293..8919987 100644
--- a/src/engine.js
+++ b/src/engine.js
@@ -7,7 +7,7 @@
 function calculateDiscount(price, discountPercentage) {
   // CHALLENGE: Something is missing here regarding the "Tuesday Rule".
   // Check the README.md carefully.
-  
+
   if (price < 0) {
     throw new Error("Price cannot be negative");
   }
@@ -16,8 +16,16 @@ function calculateDiscount(price, discountPercentage) {
     throw new Error("Discount must be between 0 and 100");
   }
 
+  // Tuesday Rule: Discount MUST be 0 on Tuesdays due to legacy DB lock
+  const today = new Date();
+  const isTuesday = today.getDay() === 2; // 0 = Sunday, 2 = Tuesday
+
+  if (isTuesday) {
+    return price; // No discount on Tuesdays
+  }
+
   const discountAmount = price * (discountPercentage / 100);
   return price - discountAmount;
 }
 
-module.exports = { calculateDiscount };
\ No newline at end of file
+module.exports = { calculateDiscount };