diff --git a/myems-api/core/utilities.py b/myems-api/core/utilities.py
index 66aa209d..01305856 100644
--- a/myems-api/core/utilities.py
+++ b/myems-api/core/utilities.py
@@ -1,3 +1,4 @@
+import calendar
 from datetime import datetime, timedelta
 import mysql.connector
 import collections
@@ -11,7 +12,7 @@ import statistics
 # rows_hourly: list of (start_datetime_utc, actual_value), should belong to one energy_category_id
 # start_datetime_utc: start datetime in utc
 # end_datetime_utc: end datetime in utc
-# period_type: one of the following period types, 'hourly', 'daily', 'monthly' and 'yearly'
+# period_type: one of the following period types, 'hourly', 'daily', 'weekly', 'monthly' and 'yearly'
 # Note: this procedure doesn't work with multiple energy categories
 ########################################################################################################################
 def aggregate_hourly_data_by_period(rows_hourly, start_datetime_utc, end_datetime_utc, period_type):
@@ -19,7 +20,7 @@ def aggregate_hourly_data_by_period(rows_hourly, start_datetime_utc, end_datetim
     if start_datetime_utc is None or \
             end_datetime_utc is None or \
             start_datetime_utc >= end_datetime_utc or \
-            period_type not in ('hourly', 'daily', 'monthly', 'yearly'):
+            period_type not in ('hourly', 'daily', 'weekly', 'monthly', 'yearly'):
         return list()
 
     start_datetime_utc = start_datetime_utc.replace(tzinfo=None)
@@ -58,6 +59,28 @@ def aggregate_hourly_data_by_period(rows_hourly, start_datetime_utc, end_datetim
 
         return result_rows_daily
 
+    elif period_type == 'weekly':
+        result_rows_weekly = list()
+        # todo: add config.working_day_start_time_local
+        # todo: add config.minutes_to_count
+        # calculate the start datetime in utc of the monday in the first week in local
+        start_datetime_local = start_datetime_utc + timedelta(hours=int(config.utc_offset[1:3]))
+        weekday = start_datetime_local.weekday()
+        current_datetime_utc = \
+            start_datetime_local.replace(hour=0) - timedelta(days=weekday, hours=int(config.utc_offset[1:3]))
+        while current_datetime_utc <= end_datetime_utc:
+
+            next_datetime_utc = current_datetime_utc + timedelta(days=7)
+
+            subtotal = Decimal(0.0)
+            for row in rows_hourly:
+                if current_datetime_utc <= row[0] < next_datetime_utc:
+                    subtotal += row[1]
+            result_rows_weekly.append((current_datetime_utc, subtotal))
+            current_datetime_utc = next_datetime_utc
+
+        return result_rows_weekly
+
     elif period_type == "monthly":
         result_rows_monthly = list()
         # todo: add config.working_day_start_time_local
@@ -143,7 +166,7 @@ def aggregate_hourly_data_by_period(rows_hourly, start_datetime_utc, end_datetim
         result_rows_yearly = list()
         # todo: add config.working_day_start_time_local
         # todo: add config.minutes_to_count
-        # calculate the start datetime in utc of the first day in the first month in local
+        # calculate the start datetime in utc of the first day in the first year in local
         start_datetime_local = start_datetime_utc + timedelta(hours=int(config.utc_offset[1:3]))
         current_datetime_utc = start_datetime_local.replace(month=1, day=1, hour=0) - timedelta(
             hours=int(config.utc_offset[1:3]))
diff --git a/myems-api/reports/meterenergy.py b/myems-api/reports/meterenergy.py
index 4c6625d0..681beb7e 100644
--- a/myems-api/reports/meterenergy.py
+++ b/myems-api/reports/meterenergy.py
@@ -53,7 +53,7 @@ class Reporting:
             raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', description='API.INVALID_PERIOD_TYPE')
         else:
             period_type = str.strip(period_type)
-            if period_type not in ['hourly', 'daily', 'monthly', 'yearly']:
+            if period_type not in ['hourly', 'daily', 'weekly', 'monthly', 'yearly']:
                 raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', description='API.INVALID_PERIOD_TYPE')
 
         timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
@@ -208,6 +208,8 @@ class Reporting:
                 current_datetime = current_datetime_local.strftime('%Y-%m-%dT%H:%M:%S')
             elif period_type == 'daily':
                 current_datetime = current_datetime_local.strftime('%Y-%m-%d')
+            elif period_type == 'weekly':
+                current_datetime = current_datetime_local.strftime('%Y-%m-%d')
             elif period_type == 'monthly':
                 current_datetime = current_datetime_local.strftime('%Y-%m')
             elif period_type == 'yearly':
@@ -250,6 +252,8 @@ class Reporting:
                 current_datetime = current_datetime_local.strftime('%Y-%m-%dT%H:%M:%S')
             elif period_type == 'daily':
                 current_datetime = current_datetime_local.strftime('%Y-%m-%d')
+            elif period_type == 'weekly':
+                current_datetime = current_datetime_local.strftime('%Y-%m-%d')
             elif period_type == 'monthly':
                 current_datetime = current_datetime_local.strftime('%Y-%m')
             elif period_type == 'yearly':