diff --git a/src/components/NeoFetch.tsx b/src/components/NeoFetch.tsx
index 7bce4d3..1d4764b 100644
--- a/src/components/NeoFetch.tsx
+++ b/src/components/NeoFetch.tsx
@@ -25,17 +25,28 @@ export default function NeoFetch() {
             {(() => {
               const startDate = new Date("2010-11-08T03:00:00+09:00");
               const now = new Date();
-              let diff = now.getTime() - startDate.getTime();
-
-              const years = Math.floor(diff / (1000 * 60 * 60 * 24 * 365));
-              diff %= 1000 * 60 * 60 * 24 * 365;
-              const days = Math.floor(diff / (1000 * 60 * 60 * 24));
-              diff %= 1000 * 60 * 60 * 24;
-              const hours = Math.floor(diff / (1000 * 60 * 60));
-              diff %= 1000 * 60 * 60;
-              const mins = Math.floor(diff / (1000 * 60));
-
-              return `${years} years, ${days} days, ${hours} hours, ${mins} mins`;
+              
+              let diff = now - startDate;
+              
+              // 밀리초를 단순 나눗셈으로 안 하고 실제 날짜 차이로 계산
+              const start = new Date(startDate);
+              let years = now.getFullYear() - start.getFullYear();
+              
+              start.setFullYear(start.getFullYear() + years);
+              if (start > now) {
+                years--;
+                start.setFullYear(start.getFullYear() - 1);
+              }
+              
+              let days = Math.floor((now - start) / (1000 * 60 * 60 * 24));
+              start.setDate(start.getDate() + days);
+              
+              let hours = Math.floor((now - start) / (1000 * 60 * 60));
+              start.setHours(start.getHours() + hours);
+              
+              let mins = Math.floor((now - start) / (1000 * 60));
+              
+              console.log(`${years} years, ${days} days, ${hours} hours, ${mins} mins`);
             })()}
           </p>