diff --git a/scripts/timereference_fake.py b/scripts/timereference_fake.py
index c186fa4..10120d0 100644
--- a/scripts/timereference_fake.py
+++ b/scripts/timereference_fake.py
@@ -1,8 +1,37 @@
 #!/usr/bin/env python3
+
+"""Copyright (c) 2014-2021 Vladimir Ermakov. All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+       * Redistributions of source code must retain the above copyright
+         notice, this list of conditions and the following disclaimer.
+
+       * Redistributions in binary form must reproduce the above copyright
+         notice, this list of conditions and the following disclaimer in the
+         documentation and/or other materials provided with the distribution.
+
+       * Neither the name of the copyright holder nor the names of its
+         contributors may be used to endorse or promote products derived from
+         this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+"""
+import time
 import rclpy
 from rclpy.node import Node
 from sensor_msgs.msg import TimeReference
-import time
 
 
 class FakeTimePublisher(Node):
@@ -25,21 +54,17 @@ def publish_time(self):
         # Increment the current time by 1 second
         self.current_time += 1
 
-        # Convert the current time to a human-readable format
-        readable_time = time.strftime(
-            "%Y-%m-%d %H:%M:%S", time.localtime(self.current_time)
-        )
-
         # Create a message and publish it
         msg = TimeReference()
         msg.header.stamp = self.get_clock().now().to_msg()
         msg.source = "fake_time_publisher"
         msg.time_ref.sec = int(self.current_time)
-        msg.time_ref.nanosec = int((self.current_time - int(self.current_time)) * 1e9)
+        msg.time_ref.nanosec = int((
+            self.current_time - int(self.current_time)) * 1e9)
         self.publisher_.publish(msg)
 
         # Log the published time
-        self.get_logger().info('Publishing: "%s"' % msg)
+        self.get_logger().info(f'Publishing: {msg}')
 
 
 def main(args=None):