diff --git a/datafusion/functions/src/datetime/common.rs b/datafusion/functions/src/datetime/common.rs
index bc4d0d8537e5..829f13b5a0a6 100644
--- a/datafusion/functions/src/datetime/common.rs
+++ b/datafusion/functions/src/datetime/common.rs
@@ -1,3 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 use std::sync::Arc;
 
 use arrow::compute::kernels::cast_utils::string_to_timestamp_nanos;
diff --git a/datafusion/functions/src/datetime/to_date.rs b/datafusion/functions/src/datetime/to_date.rs
index f84202fba261..e1b842680ca4 100644
--- a/datafusion/functions/src/datetime/to_date.rs
+++ b/datafusion/functions/src/datetime/to_date.rs
@@ -1,3 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 use std::any::Any;
 
 use arrow::datatypes::DataType;