diff --git a/src/main/java/unithon/uniletter/event/service/EventService.java b/src/main/java/unithon/uniletter/event/service/EventService.java
index 56322b9..a91fa23 100644
--- a/src/main/java/unithon/uniletter/event/service/EventService.java
+++ b/src/main/java/unithon/uniletter/event/service/EventService.java
@@ -12,6 +12,7 @@
 import unithon.uniletter.member.repository.MemberRepository;
 import unithon.uniletter.message.dto.MessageResponse;
 import unithon.uniletter.message.repository.MessageRepository;
+import unithon.uniletter.time.service.TimeGenerator;
 
 import java.time.LocalDate;
 import java.util.Arrays;
@@ -24,6 +25,7 @@ public class EventService {
 
     private final EventRepository eventRepository;
     private final MessageRepository messageRepository;
+    private final TimeGenerator timeGenerator;
     private final MemberRepository memberRepository;
 
     @Transactional
@@ -43,7 +45,7 @@ public List<Event> findMemberEventAfterToday(final String nickName) {
         if (!memberRepository.existsByNickname(nickName)) {
             throw new NotFoundException("닉네임에 해당하는 멤버를 찾을 수 없습니다.");
         }
-        return eventRepository.findEventsAfterToday(nickName, LocalDate.now());
+        return eventRepository.findEventsAfterToday(nickName, timeGenerator.generate());
     }
 
     public List<EventType> findEventTypeAll() {
diff --git a/src/main/java/unithon/uniletter/message/repository/MessageRepository.java b/src/main/java/unithon/uniletter/message/repository/MessageRepository.java
index 4d37078..f50aa82 100644
--- a/src/main/java/unithon/uniletter/message/repository/MessageRepository.java
+++ b/src/main/java/unithon/uniletter/message/repository/MessageRepository.java
@@ -1,14 +1,25 @@
 package unithon.uniletter.message.repository;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import unithon.uniletter.common.error.NotFoundException;
 import unithon.uniletter.message.Message;
 
+import java.time.LocalDate;
 import java.util.List;
 import java.util.UUID;
 
 public interface MessageRepository extends JpaRepository<Message, UUID> {
-    List<Message> findByReceiverIdAndIsReadOrderBySendPlannedAtAsc(UUID receiverId, Boolean isRead);
+    @Query("""
+            select message
+            from Message message
+            join fetch Member member
+            on member.id = message.receiverId
+            where message.isRead = false
+            and message.sendPlannedAt <= :today
+            order by message.sendPlannedAt asc
+            """)
+    List<Message> readArriveMessage(final UUID receiverId, final Boolean isRead, final LocalDate today);
 
     List<Message> findByReceiverIdOrderBySendPlannedAtDesc(UUID receiverId);
 
diff --git a/src/main/java/unithon/uniletter/message/service/MessageService.java b/src/main/java/unithon/uniletter/message/service/MessageService.java
index e9b8b71..cd941c0 100644
--- a/src/main/java/unithon/uniletter/message/service/MessageService.java
+++ b/src/main/java/unithon/uniletter/message/service/MessageService.java
@@ -12,6 +12,7 @@
 import unithon.uniletter.message.dto.MessageRequest;
 import unithon.uniletter.message.dto.MessageResponse;
 import unithon.uniletter.message.repository.MessageRepository;
+import unithon.uniletter.time.service.TimeGenerator;
 
 import java.util.List;
 import java.util.UUID;
@@ -23,6 +24,7 @@
 @Transactional
 public class MessageService {
 
+    private final TimeGenerator timeGenerator;
     private final MessageRepository messageRepository;
     private final MemberRepository memberRepository;
     private final EventRepository eventRepository;
@@ -44,7 +46,7 @@ public void sendMessage(final MessageRequest request, final Member loginMember)
 
     @Transactional
     public List<MessageResponse> getUnreadMessages(final Member member) {
-        final List<Message> messages = messageRepository.findByReceiverIdAndIsReadOrderBySendPlannedAtAsc(member.getId(), false);
+        final List<Message> messages = messageRepository.readArriveMessage(member.getId(), false, timeGenerator.generate());
         messages.forEach(Message::read);
         return getMessageWithEvent(messages);
     }
diff --git a/src/main/java/unithon/uniletter/time/TimeRequest.java b/src/main/java/unithon/uniletter/time/TimeRequest.java
new file mode 100644
index 0000000..8791685
--- /dev/null
+++ b/src/main/java/unithon/uniletter/time/TimeRequest.java
@@ -0,0 +1,6 @@
+package unithon.uniletter.time;
+
+import java.time.LocalDate;
+
+public record TimeRequest(LocalDate localDate) {
+}
diff --git a/src/main/java/unithon/uniletter/time/controller/TimeController.java b/src/main/java/unithon/uniletter/time/controller/TimeController.java
new file mode 100644
index 0000000..e91a368
--- /dev/null
+++ b/src/main/java/unithon/uniletter/time/controller/TimeController.java
@@ -0,0 +1,21 @@
+package unithon.uniletter.time.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+import unithon.uniletter.time.TimeRequest;
+import unithon.uniletter.time.service.TimeService;
+
+@RestController
+@RequiredArgsConstructor
+public class TimeController {
+
+    private final TimeService timeService;
+
+    @PostMapping("/time")
+    public ResponseEntity<Void> setServerTime(final TimeRequest timeRequest) {
+        timeService.setServerTime(timeRequest.localDate());
+        return ResponseEntity.ok().build();
+    }
+}
diff --git a/src/main/java/unithon/uniletter/time/service/TimeGenerator.java b/src/main/java/unithon/uniletter/time/service/TimeGenerator.java
new file mode 100644
index 0000000..e7c4e8d
--- /dev/null
+++ b/src/main/java/unithon/uniletter/time/service/TimeGenerator.java
@@ -0,0 +1,23 @@
+package unithon.uniletter.time.service;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalDate;
+import java.util.Optional;
+
+@RequiredArgsConstructor
+@Component
+public class TimeGenerator {
+
+    private LocalDate localDate;
+
+    public LocalDate generate() {
+        return Optional.ofNullable(localDate)
+                .orElseGet(LocalDate::now);
+    }
+
+    public void setLocalDate(final LocalDate localDate) {
+        this.localDate = localDate;
+    }
+}
diff --git a/src/main/java/unithon/uniletter/time/service/TimeService.java b/src/main/java/unithon/uniletter/time/service/TimeService.java
new file mode 100644
index 0000000..9324e75
--- /dev/null
+++ b/src/main/java/unithon/uniletter/time/service/TimeService.java
@@ -0,0 +1,17 @@
+package unithon.uniletter.time.service;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDate;
+
+@RequiredArgsConstructor
+@Service
+public class TimeService {
+
+    private final TimeGenerator timeGenerator;
+
+    public void setServerTime(final LocalDate localDate) {
+        timeGenerator.setLocalDate(localDate);
+    }
+}