diff --git a/latecomers/notifier.py b/latecomers/notifier.py
index 9e45517..d72f6eb 100644
--- a/latecomers/notifier.py
+++ b/latecomers/notifier.py
@@ -1,5 +1,6 @@
 # -*- encoding: utf-8 -*-
 from contextlib import contextmanager
+from datetime import datetime
 from email import encoders
 from email.mime.base import MIMEBase
 from email.mime.multipart import MIMEMultipart
@@ -62,6 +63,7 @@ class Notifier(object):
         body = f"Resoconto dei voli dal sito di AdR per l'aereoporto di Ciampino in data {date}"  # noqa: E501
 
         message = MIMEMultipart()
+        message["Date"] = datetime.now().strftime("%a, %d %b %Y %H:%M:%S %z")
         message["From"] = self._from
         message["To"] = ",".join(to)
         if cc:
@@ -95,6 +97,7 @@ il vostro tecnico preferito.
         """
 
         message = MIMEMultipart()
+        message["Date"] = datetime.now().strftime("%a, %d %b %Y %H:%M:%S %z")
         message["From"] = self._from
         message["To"] = ",".join(to)
         if cc: