diff --git a/api/src/main/kotlin/com/few/api/web/controller/article/response/ReadArticleResponse.kt b/api/src/main/kotlin/com/few/api/web/controller/article/response/ReadArticleResponse.kt
index fa609cfa0..ecb76a624 100644
--- a/api/src/main/kotlin/com/few/api/web/controller/article/response/ReadArticleResponse.kt
+++ b/api/src/main/kotlin/com/few/api/web/controller/article/response/ReadArticleResponse.kt
@@ -1,6 +1,5 @@
 package com.few.api.web.controller.article.response
 
-import com.fasterxml.jackson.annotation.JsonFormat
 import java.net.URL
 import java.time.LocalDateTime
 
@@ -12,7 +11,6 @@ data class ReadArticleResponse(
     val content: String,
     val problemIds: List<Long>,
     val category: String,
-    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     val createdAt: LocalDateTime,
     val views: Long,
     val workbooks: List<WorkbookInfo> = emptyList(),
diff --git a/api/src/main/kotlin/com/few/api/web/controller/subscription/response/MainViewBrowseSubscribeWorkbooksResponse.kt b/api/src/main/kotlin/com/few/api/web/controller/subscription/response/MainViewBrowseSubscribeWorkbooksResponse.kt
index ccf23008a..c7a8b2972 100644
--- a/api/src/main/kotlin/com/few/api/web/controller/subscription/response/MainViewBrowseSubscribeWorkbooksResponse.kt
+++ b/api/src/main/kotlin/com/few/api/web/controller/subscription/response/MainViewBrowseSubscribeWorkbooksResponse.kt
@@ -1,6 +1,5 @@
 package com.few.api.web.controller.subscription.response
 
-import com.fasterxml.jackson.annotation.JsonFormat
 import com.fasterxml.jackson.annotation.JsonInclude
 import com.few.api.domain.workbook.usecase.dto.WriterDetail
 import java.net.URL
@@ -17,7 +16,6 @@ data class MainViewSubscribeWorkbookInfo(
     val title: String,
     val description: String,
     val category: String,
-    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
     val createdAt: LocalDateTime,
     val writerDetails: List<WriterDetail>,
     val subscriptionCount: Long,
diff --git a/api/src/main/kotlin/com/few/api/web/controller/workbook/article/response/ReadWorkBookArticleResponse.kt b/api/src/main/kotlin/com/few/api/web/controller/workbook/article/response/ReadWorkBookArticleResponse.kt
index 4279a4f10..2d10346aa 100644
--- a/api/src/main/kotlin/com/few/api/web/controller/workbook/article/response/ReadWorkBookArticleResponse.kt
+++ b/api/src/main/kotlin/com/few/api/web/controller/workbook/article/response/ReadWorkBookArticleResponse.kt
@@ -1,6 +1,5 @@
 package com.few.api.web.controller.workbook.article.response
 
-import com.fasterxml.jackson.annotation.JsonFormat
 import com.few.api.domain.workbook.article.dto.ReadWorkBookArticleOut
 import com.few.api.web.controller.workbook.response.WriterInfo
 import java.time.LocalDateTime
@@ -12,7 +11,6 @@ data class ReadWorkBookArticleResponse(
     val content: String,
     val problemIds: List<Long>,
     val category: String,
-    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
     val createdAt: LocalDateTime,
     val day: Long,
 ) {
diff --git a/api/src/main/kotlin/com/few/api/web/controller/workbook/response/BrowseWorkBooksResponse.kt b/api/src/main/kotlin/com/few/api/web/controller/workbook/response/BrowseWorkBooksResponse.kt
index 23434471d..bedb84de9 100644
--- a/api/src/main/kotlin/com/few/api/web/controller/workbook/response/BrowseWorkBooksResponse.kt
+++ b/api/src/main/kotlin/com/few/api/web/controller/workbook/response/BrowseWorkBooksResponse.kt
@@ -1,6 +1,5 @@
 package com.few.api.web.controller.workbook.response
 
-import com.fasterxml.jackson.annotation.JsonFormat
 import java.net.URL
 import java.time.LocalDateTime
 
@@ -14,7 +13,6 @@ data class BrowseWorkBookInfo(
     val title: String,
     val description: String,
     val category: String,
-    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     val createdAt: LocalDateTime,
     val writers: List<WriterInfo>,
     val subscriberCount: Long,
diff --git a/api/src/main/kotlin/com/few/api/web/controller/workbook/response/ReadWorkBookResponse.kt b/api/src/main/kotlin/com/few/api/web/controller/workbook/response/ReadWorkBookResponse.kt
index 26e4ff94c..090ef090f 100644
--- a/api/src/main/kotlin/com/few/api/web/controller/workbook/response/ReadWorkBookResponse.kt
+++ b/api/src/main/kotlin/com/few/api/web/controller/workbook/response/ReadWorkBookResponse.kt
@@ -1,6 +1,5 @@
 package com.few.api.web.controller.workbook.response
 
-import com.fasterxml.jackson.annotation.JsonFormat
 import com.few.api.domain.workbook.usecase.dto.ReadWorkbookUseCaseOut
 import java.net.URL
 import java.time.LocalDateTime
@@ -11,7 +10,6 @@ data class ReadWorkBookResponse(
     val title: String,
     val description: String,
     val category: String,
-    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
     val createdAt: LocalDateTime,
     val writers: List<WriterInfo>,
     val articles: List<ArticleInfo>,