diff --git a/Jugenddienst Stunden/Types/Hours.cs b/Jugenddienst Stunden/Types/Hours.cs
index a211b10..c5b824b 100644
--- a/Jugenddienst Stunden/Types/Hours.cs	
+++ b/Jugenddienst Stunden/Types/Hours.cs	
@@ -8,13 +8,13 @@ public partial class Hours : ObservableObject {
 	/// Total time in seconds for the current context.
 	/// "zeit" is used by the API to represent the current recorded time value.
 	/// </summary>
-	public int zeit;
+	public int? zeit { get; set; }
 
 	/// <summary>
 	/// Nominal working time expectation (e.g. seconds per day or month depending on API semantics).
 	/// Represents the expected amount of time to be worked.
 	/// </summary>
-	public int nominal;
+	public int? nominal { get; set; }
 
 	/// <summary>
 	/// List of nominal day records returned by the API.
@@ -31,7 +31,7 @@ public partial class Hours : ObservableObject {
 	/// <summary>
 	/// Total time in seconds reported by the API for the current period. Nullable if not provided.
 	/// </summary>
-	public double? zeit_total;
+	public double? zeit_total { get; set; }
 
 	/// <summary>
 	/// Daily total time values returned by the API.
@@ -54,7 +54,7 @@ public partial class Hours : ObservableObject {
 	[ObservableProperty] public double zeitausgleich;
 
 	public double zeitausgleich_month;
-	public double holiday;
+	public double? holiday { get; set; }
 	public double krankheit;
 	public double weiterbildung;
 	public double bereitschaft;
diff --git a/Jugenddienst Stunden/ViewModels/StundenViewModel.cs b/Jugenddienst Stunden/ViewModels/StundenViewModel.cs
index bb8b4ef..ec69b57 100644
--- a/Jugenddienst Stunden/ViewModels/StundenViewModel.cs	
+++ b/Jugenddienst Stunden/ViewModels/StundenViewModel.cs	
@@ -136,7 +136,7 @@ public partial class StundenViewModel : ObservableObject, IQueryAttributable, IN
 	/// <summary>
 	/// Monatsübersicht: Resturlaub
 	/// </summary>
-	public double Holiday {
+	public double? Holiday {
 		get => Hours.holiday;
 	}