diff --git a/src/main/java/side/onetime/controller/UserController.java b/src/main/java/side/onetime/controller/UserController.java
index 37c2d98..7af1ffe 100644
--- a/src/main/java/side/onetime/controller/UserController.java
+++ b/src/main/java/side/onetime/controller/UserController.java
@@ -41,4 +41,13 @@ public ResponseEntity<ApiResponse<SuccessStatus>> updateUserProfile(
         userService.updateUserProfile(authorizationHeader, updateUserProfileRequest);
         return ApiResponse.onSuccess(SuccessStatus._UPDATE_USER_PROFILE);
     }
+
+    // 유저 서비스 탈퇴 API
+    @PostMapping("/action-withdraw")
+    public ResponseEntity<ApiResponse<SuccessStatus>> withdrawService(
+            @RequestHeader("Authorization") String authorizationHeader) {
+
+        userService.withdrawService(authorizationHeader);
+        return ApiResponse.onSuccess(SuccessStatus._WITHDRAW_SERVICE);
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/side/onetime/domain/User.java b/src/main/java/side/onetime/domain/User.java
index 20f7091..6504cb1 100644
--- a/src/main/java/side/onetime/domain/User.java
+++ b/src/main/java/side/onetime/domain/User.java
@@ -37,6 +37,9 @@ public class User extends BaseEntity {
     @OneToMany(mappedBy = "user",cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     private List<Selection> selections;
 
+    @OneToMany(mappedBy = "user",cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    private List<EventParticipation> eventParticipations;
+
     @Builder
     public User(String name, String email, String nickname, String provider, String providerId) {
         this.name = name;
diff --git a/src/main/java/side/onetime/dto/EventDto.java b/src/main/java/side/onetime/dto/EventDto.java
index 721a1ad..c827a3f 100644
--- a/src/main/java/side/onetime/dto/EventDto.java
+++ b/src/main/java/side/onetime/dto/EventDto.java
@@ -9,7 +9,6 @@
 import lombok.NoArgsConstructor;
 import side.onetime.domain.*;
 import side.onetime.global.common.constant.Category;
-import side.onetime.util.DateUtil;
 
 import java.time.LocalTime;
 import java.util.ArrayList;
@@ -169,7 +168,7 @@ public static GetUserParticipatedEventsResponse of(Event event, EventParticipati
             return GetUserParticipatedEventsResponse.builder()
                     .eventId(event.getEventId())
                     .title(event.getTitle())
-                    .createdDate(DateUtil.formatDateToYearMonthDay(event.getCreatedDate()))
+                    .createdDate(String.valueOf(event.getCreatedDate()))
                     .participantCount(participantCount)
                     .eventStatus(String.valueOf(eventParticipation.getEventStatus()))
                     .build();
diff --git a/src/main/java/side/onetime/global/common/constant/SuccessStatus.java b/src/main/java/side/onetime/global/common/constant/SuccessStatus.java
index bf60b1e..8d03d01 100644
--- a/src/main/java/side/onetime/global/common/constant/SuccessStatus.java
+++ b/src/main/java/side/onetime/global/common/constant/SuccessStatus.java
@@ -42,6 +42,7 @@ public enum SuccessStatus implements BaseCode {
     _ONBOARD_USER(HttpStatus.CREATED, "201", "유저 온보딩에 성공했습니다."),
     _GET_USER_PROFILE(HttpStatus.OK, "200", "유저 정보 조회에 성공했습니다."),
     _UPDATE_USER_PROFILE(HttpStatus.OK, "200", "유저 정보 수정에 성공했습니다."),
+    _WITHDRAW_SERVICE(HttpStatus.OK, "200", "유저 서비스 탈퇴에 성공했습니다."),
     ;
 
     private final HttpStatus httpStatus;
diff --git a/src/main/java/side/onetime/service/UserService.java b/src/main/java/side/onetime/service/UserService.java
index c13a207..3586cbd 100644
--- a/src/main/java/side/onetime/service/UserService.java
+++ b/src/main/java/side/onetime/service/UserService.java
@@ -87,4 +87,11 @@ public void updateUserProfile(String authorizationHeader, UserDto.UpdateUserProf
         user.updateNickName(nickname);
         userRepository.save(user);
     }
+
+    // 유저 서비스 탈퇴 메서드
+    @Transactional
+    public void withdrawService(String authorizationHeader) {
+        User user = jwtUtil.getUserFromHeader(authorizationHeader);
+        userRepository.delete(user);
+    }
 }