diff --git a/resources/js/utils/format.ts b/resources/js/utils/format.ts
index 3053885..9c2084c 100644
--- a/resources/js/utils/format.ts
+++ b/resources/js/utils/format.ts
@@ -26,10 +26,11 @@ export const formatDate = (date: string): string => {
   if (parts.length < 3 || parts.some(isNaN)) return date;
 
   const [y, m, d] = parts;
+  // Initialize at noon to avoid timezone shifting issues
   const dt = new Date(y, m - 1, d, 12, 0, 0);
   const year = dt.getFullYear();
-  const month = String(dt.getMonth() + 1).padStart(2, '0');
-  const day = String(dt.getDate()).padStart(2, '0');
+  const month = String(dt.getMonth() + 1).padStart(2, "0");
+  const day = String(dt.getDate()).padStart(2, "0");
 
   return `${year}/${month}/${day}`;
 };
@@ -44,11 +45,11 @@ export const formatDateWithDayOfWeek = (date: string): string => {
   if (parts.length < 3 || parts.some(isNaN)) return date;
 
   const [y, m, d] = parts;
+  // Initialize at noon to avoid timezone shifting issues
   const dt = new Date(y, m - 1, d, 12, 0, 0);
-
   const year = dt.getFullYear();
-  const month = String(dt.getMonth() + 1).padStart(2, '0');
-  const day = String(dt.getDate()).padStart(2, '0');
+  const month = String(dt.getMonth() + 1).padStart(2, "0");
+  const day = String(dt.getDate()).padStart(2, "0");
   const weekDay = dt.toLocaleDateString("zh-TW", { weekday: "short" });
 
   return `${year}/${month}/${day} (${weekDay})`;