diff --git a/src/interfaces/utils.ts b/src/interfaces/utils.ts
index be350f51..ef23c9b1 100644
--- a/src/interfaces/utils.ts
+++ b/src/interfaces/utils.ts
@@ -35,7 +35,7 @@ export function calculateRetireDate(birthDate: Date) {
       break;
   }
 
-  if (flag) return new Date(`${yy + 60}-09-30T00:00:00.000Z`);
+  if (flag) return new Date(`${yy + 60}-09-30T00:00:00.000+07:00`);
 
-  return new Date(`${yy + 61}-09-30T00:00:00.000Z`);
+  return new Date(`${yy + 61}-09-30T00:00:00.000+07:00`);
 }