Updated tests

Author: jsuarezruiz

src/Controls/tests/TestCases.HostApp/Issues/Issues31117.xaml.cs

@@ -8,7 +8,7 @@ public partial class Issue31117 : ContentPage
 		public Issue31117()
 		{
 			InitializeComponent();
-			MyDatePicker.Date = new DateTime(2024, 12, 24);
+			MyDatePicker.Date = new DateTime(2024, 12, 23);
 			UpdateDisplayLabel();
 		}
 

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31117.cs

@@ -17,7 +17,7 @@ public Issue31117(TestDevice testDevice) : base(testDevice)
 	[Category(UITestCategories.DatePicker)]
 	public void DatePickerYearFormat_InitialState_DisplaysFourDigitYear()
 	{
-		// Verify initial display shows 4-digit year for 2024-12-24
+		// Verify initial display shows 4-digit year for 2024-12-23
 		var datePickerText = App.WaitForElement("MyDatePicker").GetText();
 		Assert.That(datePickerText, Does.Contain("2024"), "DatePicker should display 4-digit year initially");
 		Assert.That(datePickerText, Does.Not.Contain("/24"), "DatePicker should not show 2-digit year pattern");