diff --git a/TeachingRecordSystem/Directory.Build.props b/TeachingRecordSystem/Directory.Build.props
index e62115737..86baf3788 100644
--- a/TeachingRecordSystem/Directory.Build.props
+++ b/TeachingRecordSystem/Directory.Build.props
@@ -14,6 +14,7 @@
   <ItemGroup>
     <Using Include="Microsoft.EntityFrameworkCore" />
     <Using Include="TeachingRecordSystem.Core" />
+    <Using Include="TeachingRecordSystem.Core.CoreConstants" Static="true" />
     <Using Include="TeachingRecordSystem.Core.Events" />
     <Using Include="TeachingRecordSystem.Core.Models" />
     <Using Include="System.Threading.Tasks.Task" Alias="Task" />
diff --git a/TeachingRecordSystem/src/TeachingRecordSystem.Core/CoreConstants.cs b/TeachingRecordSystem/src/TeachingRecordSystem.Core/CoreConstants.cs
new file mode 100644
index 000000000..680e99133
--- /dev/null
+++ b/TeachingRecordSystem/src/TeachingRecordSystem.Core/CoreConstants.cs
@@ -0,0 +1,8 @@
+using System.Globalization;
+
+namespace TeachingRecordSystem.Core;
+
+public static class CoreConstants
+{
+    public static readonly CultureInfo EnGbCulture = CultureInfo.GetCultureInfo("en-GB");
+}
diff --git a/TeachingRecordSystem/src/TeachingRecordSystem.SupportUi/Pages/Persons/Index.cshtml.cs b/TeachingRecordSystem/src/TeachingRecordSystem.SupportUi/Pages/Persons/Index.cshtml.cs
index 0117ab4ea..b877c2a00 100644
--- a/TeachingRecordSystem/src/TeachingRecordSystem.SupportUi/Pages/Persons/Index.cshtml.cs
+++ b/TeachingRecordSystem/src/TeachingRecordSystem.SupportUi/Pages/Persons/Index.cshtml.cs
@@ -9,7 +9,7 @@
 namespace TeachingRecordSystem.SupportUi.Pages.Persons;
 
 [RedactParameters("Search")]
-public partial class IndexModel : PageModel
+public partial class IndexModel(TrsLinkGenerator linkGenerator, ICrmQueryDispatcher crmQueryDispatcher) : PageModel
 {
     private const int MaxSearchResultCount = 500;
     private const int PageSize = 15;
@@ -17,17 +17,6 @@ public partial class IndexModel : PageModel
     [GeneratedRegex("^\\d{7}$")]
     private static partial Regex TrnRegex();
 
-    private readonly TrsLinkGenerator _linkGenerator;
-    private readonly ICrmQueryDispatcher _crmQueryDispatcher;
-
-    public IndexModel(
-        TrsLinkGenerator linkGenerator,
-        ICrmQueryDispatcher crmQueryDispatcher)
-    {
-        _linkGenerator = linkGenerator;
-        _crmQueryDispatcher = crmQueryDispatcher;
-    }
-
     [BindProperty(SupportsGet = true)]
     [Display(Name = "Search", Description = "TRN, name or date of birth, for example 4/3/1975")]
     public string? Search { get; set; }
@@ -85,18 +74,18 @@ private async Task<IActionResult> PerformSearch()
             Contact.Fields.dfeta_NINumber);
 
         // Check if the search string is a date of birth, TRN or one or more names
-        if (DateOnly.TryParse(Search, out var dateOfBirth))
+        if (DateOnly.TryParse(Search, EnGbCulture, out var dateOfBirth))
         {
-            contacts = await _crmQueryDispatcher.ExecuteQuery(new GetActiveContactsByDateOfBirthQuery(dateOfBirth, SortBy, MaxSearchResultCount, columnSet));
+            contacts = await crmQueryDispatcher.ExecuteQuery(new GetActiveContactsByDateOfBirthQuery(dateOfBirth, SortBy, MaxSearchResultCount, columnSet));
         }
         else if (TrnRegex().IsMatch(Search!))
         {
-            var contact = await _crmQueryDispatcher.ExecuteQuery(new GetActiveContactByTrnQuery(Search!, columnSet));
+            var contact = await crmQueryDispatcher.ExecuteQuery(new GetActiveContactByTrnQuery(Search!, columnSet));
             contacts = contact is not null ? [contact] : [];
         }
         else
         {
-            contacts = await _crmQueryDispatcher.ExecuteQuery(new GetActiveContactsByNameQuery(Search!, SortBy, MaxSearchResultCount, columnSet));
+            contacts = await crmQueryDispatcher.ExecuteQuery(new GetActiveContactsByNameQuery(Search!, SortBy, MaxSearchResultCount, columnSet));
         }
         Debug.Assert(contacts is not null);
 
@@ -126,7 +115,7 @@ private async Task<IActionResult> PerformSearch()
         // if the page number is greater than the total number of pages, redirect to the first page
         if (PageNumber > TotalKnownPages)
         {
-            return Redirect(_linkGenerator.Persons(search: Search));
+            return Redirect(linkGenerator.Persons(search: Search));
         }
 
         return Page();