From 9ae705a849814d8eb863ac9d17ace53a84f3f0c3 Mon Sep 17 00:00:00 2001
From: "akito.nishiwaki" <akito.nishiwaki@ivis.co.jp>
Date: Fri, 13 Jun 2025 10:52:29 +0900
Subject: [PATCH] =?UTF-8?q?=E3=82=AB=E3=83=AC=E3=83=B3=E3=83=80=E3=83=BC?=
 =?UTF-8?q?=E6=97=A5=E6=9C=AC=E6=99=82=E9=96=93=E3=81=A7=E5=87=BA=E5=8A=9B?=
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---
 frontend/src/components/BuyDialog.tsx | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/frontend/src/components/BuyDialog.tsx b/frontend/src/components/BuyDialog.tsx
index 0d37efb..6acfdd3 100644
--- a/frontend/src/components/BuyDialog.tsx
+++ b/frontend/src/components/BuyDialog.tsx
@@ -12,6 +12,13 @@ import { NewStock } from '../types/types';
 import DatePicker, { registerLocale } from 'react-datepicker';
 import { ja } from 'date-fns/locale/ja'; // date-fnsの日本語ロケールをインポート
 
+// 日付をyyyy-MM-dd形式で返す関数
+const formatDateLocal = (date: Date) => {
+  const year = date.getFullYear();
+  const month = (date.getMonth() + 1).toString().padStart(2, '0');
+  const day = date.getDate().toString().padStart(2, '0');
+  return `${year}-${month}-${day}`;
+};
 
 // 日本語ロケールを登録
     registerLocale('ja', ja);
@@ -59,7 +66,7 @@ const BuyDialog = ({
                             popperClassName="custom-datepicker-popper"
                             selected={newStock.buyDate ? new Date(newStock.buyDate) : null}
                             onChange={(date) =>
-                                setNewStock({ ...newStock, buyDate: date ? date.toISOString().split('T')[0] : '' })
+                                setNewStock({ ...newStock, buyDate: date ? formatDateLocal(date) : '' })
                             }
                             dateFormat="yyyy/MM/dd"
                             customInput={
@@ -86,7 +93,7 @@ const BuyDialog = ({
                             popperClassName="custom-datepicker-popper"
                             selected={newStock.expDate ? new Date(newStock.expDate) : null}
                             onChange={(date) =>
-                                setNewStock({ ...newStock, expDate: date ? date.toISOString().split('T')[0] : '' })
+                                setNewStock({ ...newStock, expDate: date ? formatDateLocal(date) : '' })
                             }
                             dateFormat="yyyy/MM/dd"
                             customInput={