diff --git a/core/network/src/main/java/com/wap/wapp/core/network/source/attendancestatus/AttendanceStatusDataSourceImpl.kt b/core/network/src/main/java/com/wap/wapp/core/network/source/attendancestatus/AttendanceStatusDataSourceImpl.kt
index 853c50342..30fd28f6a 100644
--- a/core/network/src/main/java/com/wap/wapp/core/network/source/attendancestatus/AttendanceStatusDataSourceImpl.kt
+++ b/core/network/src/main/java/com/wap/wapp/core/network/source/attendancestatus/AttendanceStatusDataSourceImpl.kt
@@ -7,6 +7,7 @@ import com.wap.wapp.core.network.constant.EVENT_COLLECTION
 import com.wap.wapp.core.network.model.attendancestatus.AttendanceStatusRequest
 import com.wap.wapp.core.network.model.attendancestatus.AttendanceStatusResponse
 import com.wap.wapp.core.network.utils.await
+import com.wap.wapp.core.network.utils.getSeoulDateTimeNow
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
 import javax.inject.Inject
@@ -33,7 +34,7 @@ class AttendanceStatusDataSourceImpl @Inject constructor(
     override suspend fun postAttendanceStatus(eventId: String, userId: String): Result<Unit> =
         runCatching {
             val attendanceStatusRequest =
-                AttendanceStatusRequest(generateNowDateTime().toISOLocalDateTimeString())
+                AttendanceStatusRequest(getSeoulDateTimeNow().toISOLocalDateTimeString())
 
             firebaseFirestore.collection(ATTENDANCE_STATUS_COLLECTION)
                 .document(userId)
diff --git a/core/network/src/main/java/com/wap/wapp/core/network/source/event/EventDataSourceImpl.kt b/core/network/src/main/java/com/wap/wapp/core/network/source/event/EventDataSourceImpl.kt
index 5cafa09c9..24f5ec505 100644
--- a/core/network/src/main/java/com/wap/wapp/core/network/source/event/EventDataSourceImpl.kt
+++ b/core/network/src/main/java/com/wap/wapp/core/network/source/event/EventDataSourceImpl.kt
@@ -6,6 +6,7 @@ import com.wap.wapp.core.network.constant.EVENT_COLLECTION
 import com.wap.wapp.core.network.model.event.EventRequest
 import com.wap.wapp.core.network.model.event.EventResponse
 import com.wap.wapp.core.network.utils.await
+import com.wap.wapp.core.network.utils.getSeoulDateTimeNow
 import java.time.LocalDate
 import java.time.LocalDateTime
 import java.time.LocalTime
@@ -37,7 +38,7 @@ class EventDataSourceImpl @Inject constructor(
 
             // 선택된 날짜 1일 00시 00분 00초
             val startDateTime = date.atStartOfDay().toISOLocalDateTimeString()
-            val currentDateTime = generateNowDateTime().toISOLocalDateTimeString()
+            val currentDateTime = getSeoulDateTimeNow().toISOLocalDateTimeString()
             val task = firebaseFirestore.collection(EVENT_COLLECTION)
                 .whereGreaterThanOrEqualTo("startDateTime", startDateTime)
                 .whereLessThanOrEqualTo("startDateTime", currentDateTime)
diff --git a/core/network/src/main/java/com/wap/wapp/core/network/utils/LocalDateTime.kt b/core/network/src/main/java/com/wap/wapp/core/network/utils/LocalDateTime.kt
index 3f1a08aca..48e035e97 100644
--- a/core/network/src/main/java/com/wap/wapp/core/network/utils/LocalDateTime.kt
+++ b/core/network/src/main/java/com/wap/wapp/core/network/utils/LocalDateTime.kt
@@ -1,9 +1,12 @@
 package com.wap.wapp.core.network.utils
 
 import java.time.LocalDateTime
+import java.time.ZoneId
 import java.time.format.DateTimeFormatter
 
 internal fun String.toISOLocalDateTime(): LocalDateTime = LocalDateTime.parse(
     this,
     DateTimeFormatter.ISO_LOCAL_DATE_TIME,
 )
+
+internal fun getSeoulDateTimeNow() = LocalDateTime.now(ZoneId.of("Asia/Seoul"))