diff --git a/packages/shared/src/utils/mudPoints.ts b/packages/shared/src/utils/mudPoints.ts
index d65ec3ba3..080bdfbd8 100644
--- a/packages/shared/src/utils/mudPoints.ts
+++ b/packages/shared/src/utils/mudPoints.ts
@@ -64,6 +64,22 @@ export function shouldShowProfileDailyFreePool(
   );
 }
 
+/**
+ * 月度泥点刷新时刻的格式化器：locale / 时区 / 字段固定，提到模块级复用。
+ *
+ * 固定 `Asia/Shanghai` 与 ADR「会员账期按开通日自然月」一致；`hourCycle: 'h23'` 避免
+ * 午夜格式化成 24 点。该 formatter 会在多个渲染路径里被反复调用，构建一次即可。
+ */
+const MUD_POINT_RESET_FORMATTER = new Intl.DateTimeFormat('en-CA', {
+  timeZone: 'Asia/Shanghai',
+  year: 'numeric',
+  month: '2-digit',
+  day: '2-digit',
+  hour: '2-digit',
+  minute: '2-digit',
+  hourCycle: 'h23',
+});
+
 /**
  * 月度泥点的刷新时刻展示文案。
  *
@@ -80,15 +96,7 @@ export function formatMudPointResetAt(
   if (Number.isNaN(parsed.getTime())) {
     return null;
   }
-  const parts = new Intl.DateTimeFormat('en-CA', {
-    timeZone: 'Asia/Shanghai',
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-    hour: '2-digit',
-    minute: '2-digit',
-    hourCycle: 'h23',
-  }).formatToParts(parsed);
+  const parts = MUD_POINT_RESET_FORMATTER.formatToParts(parsed);
   const lookup = (type: Intl.DateTimeFormatPartTypes) =>
     parts.find((part) => part.type === type)?.value ?? '00';
   return `${lookup('year')}-${lookup('month')}-${lookup('day')} ${lookup('hour')}:${lookup(