diff --git a/smash/web/models/mail_template.py b/smash/web/models/mail_template.py
index a7de8d6656b3985b9631943c61322299e0d92dc4..9f00f23ed4eed22b53866a3c66b33166a6f7b03c 100644
--- a/smash/web/models/mail_template.py
+++ b/smash/web/models/mail_template.py
@@ -10,9 +10,9 @@ from .constants import MAIL_TEMPLATE_CONTEXT_CHOICES, MAIL_TEMPLATE_CONTEXT_APPO
 from ..docx_helper import process_file
 from ..models import Appointment, Visit, Subject, Worker
 
-DATE_FORMAT_FULL = "%A %-d %B %Y"
+DATE_FORMAT_FULL = "%A %d %B %Y"
 
-DATETIME_FORMAT = "%A %-d %B %Y, %H:%m"
+DATETIME_FORMAT = "%A %d %B %Y, %H:%m"
 
 DATE_FORMAT_SHORT = "%d.%m.%Y"