diff --git a/admin/views/settings/costcenter/costcenter.html b/admin/views/settings/costcenter/costcenter.html
index 28b717ce..2853bacd 100644
--- a/admin/views/settings/costcenter/costcenter.html
+++ b/admin/views/settings/costcenter/costcenter.html
@@ -120,12 +120,11 @@
 												download="{{costfile.file_name}}">{{ costfile.file_name }}</a>
 										</td>
 										<td class="text-center">{{ costfile.status }}</td>
-										<td class="text-center">{{ costfile.upload_datetime | date:'yyyy-MM-dd HH:mm'}}</td>
-
+										<td class="text-center">{{ costfile.upload_datetime}}</td>
 										<td class="text-center">
 											<a ng-click="restoreCostFile(costfile)"
 												class="btn btn-danger btn-rounded btn-xs">{{'SETTING.RESTORE' | translate}}</a>
-											<a ng-click="deleteCostFile(costfile)" 
+											<a ng-click="deleteCostFile(costfile)"
 												class="btn btn-danger btn-rounded btn-xs" >{{'SETTING.DELETE' | translate}}</a>
 										</td>
 									</tr>
diff --git a/admin/views/settings/knowledgefile/knowledgefile.html b/admin/views/settings/knowledgefile/knowledgefile.html
index 2e0240d2..01c1fbdc 100644
--- a/admin/views/settings/knowledgefile/knowledgefile.html
+++ b/admin/views/settings/knowledgefile/knowledgefile.html
@@ -22,7 +22,7 @@
 										<td class="text-center">{{ knowledgefile.id }}</td>
 										<td class="text-center"><a href="./upload/{{knowledgefile.uuid}}" download="{{knowledgefile.file_name}}">{{ knowledgefile.file_name }}</a></td>
 										<td class="text-center">{{ knowledgefile.user_display_name }}</td>
-										<td class="text-center">{{ knowledgefile.upload_datetime | date:'yyyy-MM-dd HH:mm'}}</td>
+										<td class="text-center">{{ knowledgefile.upload_datetime }}</td>
 										<td class="text-center">
 											<a ng-click="restoreKnowledgeFile(knowledgefile)"
 												class="btn btn-danger btn-rounded btn-xs">{{'SETTING.RESTORE' | translate}}</a>
diff --git a/admin/views/settings/meter/meter.html b/admin/views/settings/meter/meter.html
index 99c613ea..6c8de40d 100644
--- a/admin/views/settings/meter/meter.html
+++ b/admin/views/settings/meter/meter.html
@@ -310,7 +310,7 @@
 										</td>
 										<td class="text-center">{{ offlinemeterfile.status }}</td>
 										<td class="text-center">
-											{{ offlinemeterfile.upload_datetime | date:'yyyy-MM-dd HH:mm'}}</td>
+											{{ offlinemeterfile.upload_datetime }}</td>
 
 										<td class="text-center">
 											<a ng-click="restoreOfflineMeterFile(offlinemeterfile)"
diff --git a/myems-api/README.md b/myems-api/README.md
index efeed06e..1053428b 100644
--- a/myems-api/README.md
+++ b/myems-api/README.md
@@ -274,7 +274,7 @@ Result
 | id            | integer   | Cost File ID                     |
 | file_name     | string    | Cost File name                   |
 | uuid          | string    | Cost File UUID                   |
-| upload_datetime | float | the number of milliseconds since January 1, 1970, 00:00:00, universal time |
+| upload_datetime | string  | Upload Datetime in Local Timezone |
 | status        | string    | Cost File processing status (new, done, error)   |
 | file_object   | BLOB       | Cost File Object                 |
 
@@ -935,7 +935,7 @@ Result
 | id            | integer   | Knowledge File ID                         |
 | file_name     | string    | Knowledge File name                       |
 | uuid          | string    | Knowledge File UUID                       |
-| upload_datetime | float | the number of milliseconds since January 1, 1970, 00:00:00, universal time |
+| upload_datetime | string  | Upload Datetime in Local Timezone         |
 | user_display_name | string| Upload user's display name                |
 | file_object   | BLOB      | Knowledge File Object                     |
 
@@ -1131,7 +1131,7 @@ Result
 | id            | integer   | Offline Meter File ID                     |
 | file_name     | string    | Offline Meter File name                   |
 | uuid          | string    | Offline Meter File UUID                   |
-| upload_datetime | float | the number of milliseconds since January 1, 1970, 00:00:00, universal time |
+| upload_datetime | string  | Upload Datetime in Local Timezone         |
 | status        | string    | Offline Meter File processing status (new, done, error)   |
 | file_object   | BLOB       | Offline Meter File Object                 |
 
diff --git a/myems-api/core/costfile.py b/myems-api/core/costfile.py
index 02d710e0..7c8f65d6 100644
--- a/myems-api/core/costfile.py
+++ b/myems-api/core/costfile.py
@@ -3,7 +3,7 @@ import json
 import mysql.connector
 import config
 import uuid
-from datetime import datetime, timezone
+from datetime import datetime, timezone, timedelta
 import os
 from core.userlogger import user_logger
 
@@ -31,15 +31,18 @@ class CostFileCollection:
         cursor.close()
         cnx.disconnect()
 
+        timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
+        if config.utc_offset[0] == '-':
+            timezone_offset = -timezone_offset
+
         result = list()
         if rows is not None and len(rows) > 0:
             for row in rows:
-                upload_datetime = row[3]
-                upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
+                upload_datetime_local = row[3].replace(tzinfo=timezone.utc) + timedelta(minutes=timezone_offset)
                 meta_result = {"id": row[0],
                                "file_name": row[1],
                                "uuid": row[2],
-                               "upload_datetime": upload_datetime.timestamp() * 1000,
+                               "upload_datetime": upload_datetime_local.strftime('%Y-%m-%dT%H:%M:%S'),
                                "status": row[4]}
                 result.append(meta_result)
 
@@ -173,13 +176,15 @@ class CostFileItem:
             raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                    description='API.COST_FILE_NOT_FOUND')
 
-        upload_datetime = row[3]
-        upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
+        timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
+        if config.utc_offset[0] == '-':
+            timezone_offset = -timezone_offset
 
+        upload_datetime_local = row[3].replace(tzinfo=timezone.utc) + timedelta(minutes=timezone_offset)
         result = {"id": row[0],
                   "file_name": row[1],
                   "uuid": row[2],
-                  "upload_datetime": upload_datetime.timestamp() * 1000,
+                  "upload_datetime": upload_datetime_local.strftime('%Y-%m-%dT%H:%M:%S'),
                   "status": row[4]}
         resp.body = json.dumps(result)
 
diff --git a/myems-api/core/knowledgefile.py b/myems-api/core/knowledgefile.py
index 75154c46..029e27dc 100644
--- a/myems-api/core/knowledgefile.py
+++ b/myems-api/core/knowledgefile.py
@@ -60,13 +60,10 @@ class KnowledgeFileCollection:
                 base64_message = base64_encoded_data.decode('utf-8')
                 upload_datetime_local = row['upload_datetime_utc'].replace(tzinfo=None) + \
                     timedelta(minutes=timezone_offset)
-                upload_datetime = row['upload_datetime_utc']
-                upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
                 meta_result = {"id": row['id'],
                                "file_name": row['file_name'],
                                "uuid": row['uuid'],
-                               "upload_datetime": upload_datetime.timestamp() * 1000,
-                               "upload_datetime_local": upload_datetime_local.isoformat(),
+                               "upload_datetime": upload_datetime_local.strftime('%Y-%m-%dT%H:%M:%S'),
                                "user_display_name": user_dict.get(row['upload_user_uuid'], None),
                                "file_size_bytes": sys.getsizeof(row['file_object']),
                                "file_bytes_base64": base64_message
@@ -221,13 +218,16 @@ class KnowledgeFileItem:
             raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                    description='API.KNOWLEDGE_FILE_NOT_FOUND')
 
-        upload_datetime = row[3]
-        upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
+        timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
+        if config.utc_offset[0] == '-':
+            timezone_offset = -timezone_offset
+
+        upload_datetime_local = row[3].replace(tzinfo=timezone.utc) + timedelta(minutes=timezone_offset)
 
         result = {"id": row[0],
                   "file_name": row[1],
                   "uuid": row[2],
-                  "upload_datetime": upload_datetime.timestamp() * 1000,
+                  "upload_datetime": upload_datetime_local.strftime('%Y-%m-%dT%H:%M:%S'),
                   "user_display_name": user_dict.get(row[4], None)}
         resp.body = json.dumps(result)
 
diff --git a/myems-api/core/offlinemeterfile.py b/myems-api/core/offlinemeterfile.py
index e992c9d8..c0a6dc0c 100644
--- a/myems-api/core/offlinemeterfile.py
+++ b/myems-api/core/offlinemeterfile.py
@@ -3,7 +3,7 @@ import json
 import mysql.connector
 import config
 import uuid
-from datetime import datetime, timezone
+from datetime import datetime, timezone, timedelta
 import os
 from core.userlogger import user_logger
 
@@ -31,15 +31,18 @@ class OfflineMeterFileCollection:
         cursor.close()
         cnx.disconnect()
 
+        timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
+        if config.utc_offset[0] == '-':
+            timezone_offset = -timezone_offset
+
         result = list()
         if rows is not None and len(rows) > 0:
             for row in rows:
-                upload_datetime = row[3]
-                upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
+                upload_datetime_local = row[3].replace(tzinfo=timezone.utc) + timedelta(minutes=timezone_offset)
                 meta_result = {"id": row[0],
                                "file_name": row[1],
                                "uuid": row[2],
-                               "upload_datetime": upload_datetime.timestamp() * 1000,
+                               "upload_datetime": upload_datetime_local.strftime('%Y-%m-%dT%H:%M:%S'),
                                "status": row[4]}
                 result.append(meta_result)
 
@@ -175,13 +178,16 @@ class OfflineMeterFileItem:
             raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                    description='API.OFFLINE_METER_FILE_NOT_FOUND')
 
-        upload_datetime = row[3]
-        upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
+        timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
+        if config.utc_offset[0] == '-':
+            timezone_offset = -timezone_offset
+
+        upload_datetime_local = row[3].replace(tzinfo=timezone.utc) + timedelta(minutes=timezone_offset)
 
         result = {"id": row[0],
                   "file_name": row[1],
                   "uuid": row[2],
-                  "upload_datetime": upload_datetime.timestamp() * 1000,
+                  "upload_datetime": upload_datetime_local.strftime('%Y-%m-%dT%H:%M:%S'),
                   "status": row[4]}
         resp.body = json.dumps(result)
 
diff --git a/web/src/components/MyEMS/KnowledgeBase/KnowledgeBase.js b/web/src/components/MyEMS/KnowledgeBase/KnowledgeBase.js
index 6989ed40..ad5ee021 100644
--- a/web/src/components/MyEMS/KnowledgeBase/KnowledgeBase.js
+++ b/web/src/components/MyEMS/KnowledgeBase/KnowledgeBase.js
@@ -64,10 +64,10 @@ const KnowledgeBase = ({ setRedirect, setRedirectUrl, t }) => {
               json.forEach((currentValue, index) => {
                 let report = {}
                 report['id'] = json[index]['id'];
-                report['calendar'] = { month: json[index]['upload_datetime_local'].substring(5, 7), 
-                day: json[index]['upload_datetime_local'].substring(8, 10) };
+                report['calendar'] = { month: json[index]['upload_datetime'].substring(5, 7), 
+                day: json[index]['upload_datetime'].substring(8, 10) };
                 report['title'] = json[index]['file_name'];
-                report['additional'] = t('Created Datetime') + ': ' + json[index]['upload_datetime_local']  + '<br/>' +
+                report['additional'] = t('Created Datetime') + ': ' + json[index]['upload_datetime']  + '<br/>' +
                 t('File Size') + ': ' + (json[index]['file_size_bytes']/(1024*1024)).toFixed(2) + ' MB';
                 report['to'] = '#';
                 report['file_bytes_base64'] = json[index]['file_bytes_base64'];