diff --git a/src/lottery/schedules/dailyQuiz.ts b/src/lottery/schedules/dailyQuiz.ts
index 3c46e886..f398f2c8 100644
--- a/src/lottery/schedules/dailyQuiz.ts
+++ b/src/lottery/schedules/dailyQuiz.ts
@@ -4,23 +4,23 @@ import { completeAnswerCorrectlyQuest } from "../modules/contracts";
 
 const determineQuizResult = async () => {
   try {
-    const yesterdayMidnight = new Date();
-    yesterdayMidnight.setHours(0, 0, 0, 0);
-    yesterdayMidnight.setDate(yesterdayMidnight.getDate() + 1);
+    const tomorrowMidnight = new Date();
+    tomorrowMidnight.setHours(0, 0, 0, 0);
+    tomorrowMidnight.setDate(tomorrowMidnight.getDate() + 1);
 
     const todayMidnight = new Date();
     todayMidnight.setHours(0, 0, 0, 0);
 
-    // 어제의 퀴즈 조회
+    // 오늘의 퀴즈 조회
     const quiz = await quizModel.findOne({
       quizDate: {
-        $lt: yesterdayMidnight,
         $gte: todayMidnight,
+        $lt: tomorrowMidnight,
       },
     });
 
     if (!quiz) {
-      logger.info("No quiz found for yesterday.");
+      logger.info("No quiz found for today.");
       return;
     }
 
diff --git a/src/lottery/schedules/index.js b/src/lottery/schedules/index.js
index 62b86168..686bb1c9 100644
--- a/src/lottery/schedules/index.js
+++ b/src/lottery/schedules/index.js
@@ -2,7 +2,7 @@ const cron = require("node-cron");
 
 const registerSchedules = () => {
   cron.schedule("0 4 * * *", require("./detectAbusingUsers"));
-  cron.schedule("5 0 * * *", require("./dailyQuiz").default);
+  cron.schedule("56 23 * * *", require("./dailyQuiz").default);
 };
 
 module.exports = registerSchedules;
diff --git a/src/lottery/services/quizzes.ts b/src/lottery/services/quizzes.ts
index fc73101d..06556379 100644
--- a/src/lottery/services/quizzes.ts
+++ b/src/lottery/services/quizzes.ts
@@ -223,6 +223,14 @@ export const submitAnswerHandler: RequestHandler = async (req, res) => {
     const userId = req.userOid;
     const { answer } = req.body;
 
+    // 11시 55분 이전인지 검사하기
+    const timestamp = new Date();
+    const settingtime = new Date();
+    settingtime.setHours(23, 55, 0, 0);
+    if (timestamp > settingtime) {
+      return res.status(404).json({ message: "You can't submit answer now." });
+    }
+
     const startOfToday = new Date();
     startOfToday.setHours(0, 0, 0, 0);
 
@@ -288,6 +296,14 @@ export const cancelAnswerHandler: RequestHandler = async (req, res) => {
     // 로그인된 사용자 정보 가져오기
     const userId = req.userOid;
 
+    // 11시 55분 이전인지 검사하기
+    const timestamp = new Date();
+    const settingtime = new Date();
+    settingtime.setHours(23, 55, 0, 0);
+    if (timestamp > settingtime) {
+      return res.status(404).json({ message: "You can't submit answer now." });
+    }
+
     const startOfToday = new Date();
     startOfToday.setHours(0, 0, 0, 0);