diff --git a/functions/createPartitions.js b/functions/createPartitions.js
index b72c5d9..7f086de 100644
--- a/functions/createPartitions.js
+++ b/functions/createPartitions.js
@@ -8,7 +8,13 @@ const database = process.env.DATABASE;
 
 // creates partitions for the hour after the current hour
 exports.handler = async (event, context, callback) => {
-  var nextHour = new Date(Date.now() + 60 * 60 * 1000);
+
+  // format of dth is '2021-01-01T00'
+  var input = 'dth' in event ? `${event.dth}:00:00Z` : Date.now() + 60 * 60 * 1000;
+  var nextHour = new Date(input);
+  if (isNaN(nextHour))
+    throw new Error('invalid dth')
+
   var year = nextHour.getUTCFullYear();
   var month = (nextHour.getUTCMonth() + 1).toString().padStart(2, '0');
   var day = nextHour.getUTCDate().toString().padStart(2, '0');
diff --git a/functions/transformMissingGzDataDaily.js b/functions/transformMissingGzDataDaily.js
new file mode 100644
index 0000000..807ba1c
--- /dev/null
+++ b/functions/transformMissingGzDataDaily.js
@@ -0,0 +1,50 @@
+const util = require('./util');
+
+// AWS Glue Data Catalog database and tables
+const sourceTable = process.env.SOURCE_TABLE;
+const targetTable = process.env.TARGET_TABLE;
+const database = process.env.DATABASE;
+
+async function insertMissingGzData(database, sourceTable, targetTable, year, month, day) {
+
+  const insertStatement = `
+    -- Insert missing Gzip Data on ${year}-${month}-${day}
+    INSERT INTO ${database}.${targetTable}
+    WITH gz AS (
+      SELECT *
+      FROM ${database}.${sourceTable}
+      WHERE year = '${year}' AND month = '${month}' AND day = '${day}'
+    ), parquet AS (
+      SELECT concat(year, '-', month, '-', day, 'T', hour) dth, request_id
+      FROM ${database}.${targetTable}
+      WHERE year = '${year}' AND month = '${month}' AND day = '${day}'
+    )
+    SELECT
+      gz.*
+    FROM gz LEFT JOIN parquet
+    ON concat(gz.year, '-', gz.month, '-', gz.day, 'T', gz.hour) = parquet.dth
+      AND gz.request_id = parquet.request_id
+    WHERE parquet.request_id IS NULL`;
+
+  await util.runQuery(insertStatement);
+}
+
+// get the partitions of yesterday or use `dt` in event
+exports.handler = async (event, context, callback) => {
+  if ( 'dt' in event ) {
+    var yesterday = new Date(`${event.dt}T00:00:00Z`)
+    if (isNaN(yesterday))
+      throw new Error('invalid dt')
+  } else {
+    var yesterday = new Date();
+    yesterday.setDate(yesterday.getDate() - 1);
+  }
+
+  const year = yesterday.getUTCFullYear();
+  const month = (yesterday.getUTCMonth() + 1).toString().padStart(2, '0');
+  const day = yesterday.getUTCDate().toString().padStart(2, '0');
+
+  console.log('Insert Missing Data in Gzip Files on ', { year, month, day });
+
+  await insertMissingGzData(database, sourceTable, targetTable, year, month, day);
+}
diff --git a/template.yaml b/template.yaml
index c0d90d0..2baa854 100644
--- a/template.yaml
+++ b/template.yaml
@@ -40,6 +40,55 @@ Parameters:
         Prefix of parquet files that are created in Apache Hive
         like style by the CTAS query. Including the trailing slash.
 Resources:
+    TransformMissingGzDataDailyFn:
+        Type: AWS::Serverless::Function
+        Properties:
+            CodeUri: functions/
+            Handler: transformMissingGzDataDaily.handler
+            Runtime: nodejs12.x
+            Timeout: 900
+            Policies:
+            - Version: '2012-10-17'
+              Statement:
+                - Effect: Allow
+                  Action:
+                    - athena:StartQueryExecution
+                    - athena:GetQueryExecution
+                  Resource: '*'
+                - Effect: Allow
+                  Action:
+                    - s3:ListBucket
+                    - s3:GetBucketLocation
+                  Resource: !Sub "arn:${AWS::Partition}:s3:::${ResourcePrefix}-${AWS::AccountId}-cf-access-logs"
+                - Effect: Allow
+                  Action:
+                    - s3:PutObject
+                    - s3:GetObject
+                  Resource: !Sub "arn:${AWS::Partition}:s3:::${ResourcePrefix}-${AWS::AccountId}-cf-access-logs/*"
+                - Effect: Allow
+                  Action:
+                    - glue:CreatePartition
+                    - glue:GetDatabase
+                    - glue:GetTable
+                    - glue:BatchCreatePartition
+                    - glue:GetPartition
+                    - glue:GetPartitions
+                    - glue:CreateTable
+                    - glue:DeleteTable
+                    - glue:DeletePartition
+                  Resource: '*'
+            Environment:
+                Variables:
+                    SOURCE_TABLE: !Ref PartitionedGzTable
+                    TARGET_TABLE: !Ref PartitionedParquetTable
+                    DATABASE: !Ref CfLogsDatabase
+                    ATHENA_QUERY_RESULTS_LOCATION: !Sub "s3://${ResourcePrefix}-${AWS::AccountId}-cf-access-logs/athena-query-results"
+            Events:
+              HourlyEvt:
+                Type: Schedule
+                Properties:
+                  Schedule: cron(10 6 * * ? *)
+
     TransformPartFn:
         Type: AWS::Serverless::Function
         Properties:
@@ -512,4 +561,4 @@ Resources:
                   - { database: !Ref CfLogsDatabase,
                     partitioned_gz_table: !Ref PartitionedGzTable,
                     partitioned_parquet_table: !Ref PartitionedParquetTable }
-              - ' */'
\ No newline at end of file
+              - ' */'