diff --git a/infrastructure/abri/abri_client.py b/infrastructure/abri/abri_client.py
index 8ebd3ac2e..3c95c2766 100644
--- a/infrastructure/abri/abri_client.py
+++ b/infrastructure/abri/abri_client.py
@@ -1,4 +1,5 @@
 import xml.etree.ElementTree as ET
+from datetime import date
 from typing import List, Tuple, Union
 
 import requests
@@ -21,6 +22,10 @@ CLIENT_CODE = "HSG"
 RESOURCE_GROUP = "Surveyors"
 
 
+def _format_appointment_date(appointment_date: date) -> str:
+    return appointment_date.strftime("%d/%m/%Y")
+
+
 class AbriClient:
     def __init__(self, config: AbriConfig) -> None:
         self._config = config
@@ -36,7 +41,7 @@ class AbriClient:
                 ("short_description", request.short_description),
                 ("long_description", request.long_description),
                 ("client_ref", request.client_ref),
-                ("appointment_date", request.appointment_date.strftime("%d/%m/%Y")),
+                ("appointment_date", _format_appointment_date(request.appointment_date)),
                 ("appointment_time", request.appointment_time),
                 ("resource", self._config.default_resource),
                 ("resource_group", RESOURCE_GROUP),
@@ -52,7 +57,7 @@ class AbriClient:
         parameters = [
             ("job_no", request.job_no),
             ("action", "amend"),
-            ("appointment_date", request.appointment_date.strftime("%d/%m/%Y")),
+            ("appointment_date", _format_appointment_date(request.appointment_date)),
             ("appointment_time", request.appointment_time),
         ]
         if request.resource is not None: