diff --git a/src/shared/lib/date.ts b/src/shared/lib/date.ts
index a47ce7d2..51c0b127 100644
--- a/src/shared/lib/date.ts
+++ b/src/shared/lib/date.ts
@@ -44,17 +44,14 @@ export const formatDateLocalString = (date: Date, time: string): string => {
   return `${year}-${month}-${day}T${hour}:${minute}:00`;
 };
 
-export const formatUtcToKst = (utcString: string): string => {
-  const utcDate = new Date(utcString);
-
-  const kstTimestamp = utcDate.getTime() + 9 * 60 * 60 * 1000;
-  const kstDate = new Date(kstTimestamp);
-
-  const year = kstDate.getFullYear();
-  const month = (kstDate.getMonth() + 1).toString().padStart(2, '0');
-  const day = kstDate.getDate().toString().padStart(2, '0');
-  const hours = kstDate.getHours().toString().padStart(2, '0');
-  const minutes = kstDate.getMinutes().toString().padStart(2, '0');
+export const formatLst = (utcString: string): string => {
+  const localDate = new Date(utcString);
+
+  const year = localDate.getFullYear();
+  const month = (localDate.getMonth() + 1).toString().padStart(2, '0');
+  const day = localDate.getDate().toString().padStart(2, '0');
+  const hours = localDate.getHours().toString().padStart(2, '0');
+  const minutes = localDate.getMinutes().toString().padStart(2, '0');
 
   return `${year}년 ${month}월 ${day}일 ${hours}:${minutes}`;
 };
diff --git a/src/widgets/dashboard/ui/email/SentMailCard.tsx b/src/widgets/dashboard/ui/email/SentMailCard.tsx
index 0872c19c..a329ce63 100644
--- a/src/widgets/dashboard/ui/email/SentMailCard.tsx
+++ b/src/widgets/dashboard/ui/email/SentMailCard.tsx
@@ -1,7 +1,7 @@
 import arrow from '../../../../../public/assets/dashboard/mail/Arrow.svg';
 import { useState } from 'react';
 import IconButton from '../../../../../design-system/ui/buttons/IconButton';
-import { formatUtcToKst } from '../../../../shared/lib/date';
+import { formatLst } from '../../../../shared/lib/date';
 import TertiaryButton from '../../../../../design-system/ui/buttons/TertiaryButton';
 import { useNavigate, useParams } from 'react-router-dom';
 import { ReadEmailResponse } from '../../../../features/dashboard/model/email';
@@ -38,7 +38,7 @@ const SentMailCard = ({ mail, isPending = false, onClickDelete }: SentMailCardPr
             <p>{mail.title}</p>
           </div>
           <p className="text-sm text-placeholderText">
-            {formatUtcToKst(mail.reservationDate)}
+            {formatLst(mail.reservationDate)}
           </p>
         </div>
         <IconButton