Addressed PR comments

Author: Andyg79

utils/date_time_utils.py

@@ -117,23 +117,17 @@ def month_string_to_number(string: str) -> int:
             out = months[month_short]
             return out
         except Exception:
-            raise ValueError("Not a month")
+            raise ValueError(
+                f"'{string}' is not a valid month name. Accepted values are: {', '.join(months.keys())}"
+            )
 
     @staticmethod
     def generate_unique_weekday_date(start_year: int = 2025) -> str:
         """
-        Generates a future weekday date from the specified year onward.
+        Returns a random future weekday (Mon–Fri) date from the given year onward.
 
-        This function returns a dynamically generated date string in the format 'dd/mm/yyyy'
-        that always falls on a weekday (Monday–Friday) and is suitable for use in automated tests
-        where the date must differ on each run to avoid duplication issues.
-
-        A small pseudorandom offset is added to ensure uniqueness between runs.
-
-        Note:
-            This function uses Python's built-in `random` module to add variability.
-            Since this is for test-only purposes and does not involve security-sensitive logic,
-            the use of a non-cryptographic PRNG is appropriate and intentional.
+        The result is in 'dd/mm/yyyy' format and useful for automated tests needing
+        unique, non-weekend dates. Uses non-cryptographic randomness for variability between runs.
 
         Args:
             start_year (int): The minimum year from which the date may be generated. Defaults to 2025.