diff --git a/Elwig/Helpers/AppDbContext.cs b/Elwig/Helpers/AppDbContext.cs
index 3d904da..f587c21 100644
--- a/Elwig/Helpers/AppDbContext.cs
+++ b/Elwig/Helpers/AppDbContext.cs
@@ -7,8 +7,9 @@ namespace Elwig.Helpers {
     public class AppDbContext : DbContext {
 
         public DbSet<Country> Countries { get; set; }
+        public DbSet<Currency> Currencies { get; set; }
         public DbSet<Member> Members { get; set; }
-        public DbSet<BillingAddress> BillingAddresses { get; set; }
+        public DbSet<BillingAddr> BillingAddresses { get; set; }
         public DbSet<AT_Gem> Gemeinden { get; set; }
         public DbSet<AT_Kg> Katastralgemeinden { get; set; }
         public DbSet<AT_Ort> Orte { get; set; }
@@ -17,12 +18,15 @@ namespace Elwig.Helpers {
         public DbSet<Branch> Branches { get; set; }
         public DbSet<WbKg> WbKgs { get; set; }
         public DbSet<WbRd> WbRde { get; set; }
-        public DbSet<AreaCommitment> AreaCommitments { get; set; }
+        public DbSet<AreaCom> AreaCommitments { get; set; }
+        public DbSet<AreaComParcel> AreaCommitmentParcels { get; set; }
+        public DbSet<AreaComAttr> AreaCommitmentAttributes { get; set; }
         public DbSet<Contract> Contracts { get; set; }
         public DbSet<WineAttr> WineAttributes { get; set; }
         public DbSet<WineCult> WineCultivations { get; set; }
         public DbSet<WineQual> WineQualities { get; set; }
         public DbSet<WineVar> WineVarieties { get; set; }
+        public DbSet<Season> Seasons { get; set; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) {
             optionsBuilder.UseSqlite($"Data Source=\"{App.Config.DatabaseFile}\"; Foreign Keys=True; Mode=ReadWrite; Cache=Default");
diff --git a/Elwig/Helpers/Utils.cs b/Elwig/Helpers/Utils.cs
index 321d5d0..d91ac73 100644
--- a/Elwig/Helpers/Utils.cs
+++ b/Elwig/Helpers/Utils.cs
@@ -86,5 +86,13 @@ namespace Elwig.Helpers {
                 UseShellExecute = true,
             });
         }
+
+        public static double KmwToOe(double kmw) {
+            return Math.Round(kmw * (4.54 + 0.022 * kmw), 0);
+        }
+
+        public static double OeToKmw(double oe) {
+            return Math.Round((-4.54 + Math.Sqrt(4.54 * 4.54 - 4 * 0.022 * -oe)) / 2 * 0.022, 1);
+        }
     }
 }
diff --git a/Elwig/Models/AreaCommitment.cs b/Elwig/Models/AreaCom.cs
similarity index 51%
rename from Elwig/Models/AreaCommitment.cs
rename to Elwig/Models/AreaCom.cs
index bd4a8be..14a7ce6 100644
--- a/Elwig/Models/AreaCommitment.cs
+++ b/Elwig/Models/AreaCom.cs
@@ -1,49 +1,39 @@
 using Microsoft.EntityFrameworkCore;
+using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
 
 namespace Elwig.Models {
-    [Table("area_commitment"), PrimaryKey("VNr", "KgNr", "GstNr")]
-    public class AreaCommitment {
+    [Table("area_commitment"), PrimaryKey("VNr")]
+    public class AreaCom {
         [Column("vnr")]
         public int VNr { get; set; }
 
-        [Column("kgnr")]
-        public int KgNr { get; set; }
-
-        [Column("gstnr")]
-        public string? GstNr { get; set; }
-
-        [Column("rdnr")]
-        public int? RdNr { get; set; }
-
         [Column("area")]
         public int Area { get; set; }
 
         [Column("sortid")]
         public string SortId { get; set; }
 
-        [Column("attrid")]
-        public string? AttrId { get; set; }
-
         [Column("cultid")]
         public string CultId { get; set; }
 
-        [ForeignKey("KgNr")]
-        public virtual WbKg Kg { get; private set; }
-
-        [ForeignKey("KgNr, RdNr")]
-        public virtual WbRd? Rd { get; private set; }
-
         [ForeignKey("VNr")]
         public virtual Contract Contract { get; private set; }
 
         [ForeignKey("SortId")]
         public virtual WineVar WineVar { get; private set; }
 
-        [ForeignKey("AttrId")]
-        public virtual WineAttr WineAttr { get; private set; }
-
         [ForeignKey("CultId")]
         public virtual WineCult WineCult { get; private set; }
+
+        [InverseProperty("AreaCom")]
+        public virtual ISet<AreaComParcel> Parcels { get; private set; }
+
+        [InverseProperty("AreaCom")]
+        public virtual ISet<AreaComAttr> AttributeEntries { get; private set; }
+
+        [NotMapped]
+        public IEnumerable<WineAttr> Attributes => AttributeEntries.Select(e => e.WineAttr);
     }
 }
diff --git a/Elwig/Models/AreaComAttr.cs b/Elwig/Models/AreaComAttr.cs
new file mode 100644
index 0000000..c8e58e9
--- /dev/null
+++ b/Elwig/Models/AreaComAttr.cs
@@ -0,0 +1,19 @@
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models {
+    [Table("area_commitment_attribute"), PrimaryKey("VNr", "AttrId")]
+    public class AreaComAttr {
+        [Column("vnr")]
+        public int VNr { get; set; }
+
+        [Column("attrid")]
+        public string AttrId { get; set; }
+
+        [ForeignKey("VNr")]
+        public virtual AreaCom AreaCom { get; private set; }
+
+        [ForeignKey("AttrId")]
+        public virtual WineAttr WineAttr { get; private set; }
+    }
+}
diff --git a/Elwig/Models/AreaComParcel.cs b/Elwig/Models/AreaComParcel.cs
new file mode 100644
index 0000000..e367ff5
--- /dev/null
+++ b/Elwig/Models/AreaComParcel.cs
@@ -0,0 +1,31 @@
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models {
+    [Table("area_commitment_parcel"), PrimaryKey("VNr", "KgNr", "GstNr")]
+    public class AreaComParcel {
+        [Column("vnr")]
+        public int VNr { get; set; }
+
+        [Column("kgnr")]
+        public int KgNr { get; set; }
+
+        [Column("gstnr")]
+        public string? GstNr { get; set; }
+
+        [Column("rdnr")]
+        public int? RdNr { get; set; }
+
+        [Column("area")]
+        public int? Area { get; set; }
+
+        [ForeignKey("KgNr")]
+        public virtual WbKg Kg { get; private set; }
+
+        [ForeignKey("KgNr, RdNr")]
+        public virtual WbRd? Rd { get; private set; }
+
+        [ForeignKey("VNr")]
+        public virtual AreaCom AreaCom { get; private set; }
+    }
+}
diff --git a/Elwig/Models/BillingAddress.cs b/Elwig/Models/BillingAddr.cs
similarity index 96%
rename from Elwig/Models/BillingAddress.cs
rename to Elwig/Models/BillingAddr.cs
index ef7205c..e025884 100644
--- a/Elwig/Models/BillingAddress.cs
+++ b/Elwig/Models/BillingAddr.cs
@@ -3,7 +3,7 @@ using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Elwig.Models {
     [Table("member_billing_address"), PrimaryKey("MgNr")]
-    public class BillingAddress {
+    public class BillingAddr {
         [Column("mgnr")]
         public int MgNr { get; set; }
 
diff --git a/Elwig/Models/Contract.cs b/Elwig/Models/Contract.cs
index 498f506..3b4dfc3 100644
--- a/Elwig/Models/Contract.cs
+++ b/Elwig/Models/Contract.cs
@@ -1,7 +1,6 @@
 using Microsoft.EntityFrameworkCore;
-using System.Collections.Generic;
+using System;
 using System.ComponentModel.DataAnnotations.Schema;
-using System.Linq;
 
 namespace Elwig.Models {
     [Table("contract"), PrimaryKey("VNr")]
@@ -12,19 +11,35 @@ namespace Elwig.Models {
         [Column("mgnr")]
         public int MgNr { get; set; }
 
+        [Column("date")]
+        public string? DateString { get; set; }
+
+        [NotMapped]
+        public DateOnly? Date {
+            get {
+                return DateString != null ? DateOnly.ParseExact(DateString, "yyyy-MM-dd") : null;
+            }
+            set {
+                DateString = value?.ToString("yyyy-MM-dd");
+            }
+        }
+
         [Column("year_from")]
         public int YearFrom { get; set; }
 
         [Column("year_to")]
         public int? YearTo { get; set; }
 
+        [Column("comment")]
+        public string? Comment { get; set; }
+
         [ForeignKey("MgNr")]
         public virtual Member Member { get; private set; }
 
         [InverseProperty("Contract")]
-        public virtual ISet<AreaCommitment> AreaCommitments { get; private set; }
+        public virtual AreaCom? AreaCom { get; private set; }
 
         [NotMapped]
-        public int Area => AreaCommitments.Select(a => a.Area).Sum();
+        public int? Area => AreaCom?.Area;
     }
 }
diff --git a/Elwig/Models/Currency.cs b/Elwig/Models/Currency.cs
new file mode 100644
index 0000000..7d5e937
--- /dev/null
+++ b/Elwig/Models/Currency.cs
@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models {
+    [Table("currency"), PrimaryKey("Code")]
+    public class Currency {
+        [Column("code")]
+        public string Code { get; private set; }
+
+        [Column("name")]
+        public string Name { get; private set; }
+
+        [Column("symbol")]
+        public string? Symbol { get; private set; }
+
+        [Column("one_euro")]
+        public int? OneEuroValue { get; private set; }
+
+        [NotMapped]
+        public decimal? OneEuro => OneEuroValue / 1_000_000;
+    }
+}
diff --git a/Elwig/Models/Member.cs b/Elwig/Models/Member.cs
index 4f22268..2fa6654 100644
--- a/Elwig/Models/Member.cs
+++ b/Elwig/Models/Member.cs
@@ -38,10 +38,30 @@ namespace Elwig.Models {
         public string? Birthday { get; set; }
 
         [Column("entry_date")]
-        public string? EntryDate { get; set; }
+        public string? EntryDateString { get; set; }
+
+        [NotMapped]
+        public DateOnly? EntryDate {
+            get {
+                return EntryDateString != null ? DateOnly.ParseExact(EntryDateString, "yyyy-MM-dd") : null;
+            }
+            set {
+                EntryDateString = value?.ToString("yyyy-MM-dd");
+            }
+        }
 
         [Column("exit_date")]
-        public string? ExitDate { get; set; }
+        public string? ExitDateString { get; set; }
+
+        [NotMapped]
+        public DateOnly? ExitDate {
+            get {
+                return ExitDateString != null ? DateOnly.ParseExact(ExitDateString, "yyyy-MM-dd") : null;
+            }
+            set {
+                ExitDateString = value?.ToString("yyyy-MM-dd");
+            }
+        }
 
         [Column("business_shares")]
         public int BusinessShares { get; set; }
@@ -125,7 +145,7 @@ namespace Elwig.Models {
         public virtual ISet<Contract> Contracts { get; private set; }
 
         [InverseProperty("Member")]
-        public virtual BillingAddress BillingAddress { get; private set; }
+        public virtual BillingAddr BillingAddress { get; private set; }
 
         public int SearchScore(IEnumerable<string> keywords) {
             keywords = keywords.Where(s => s.Length >= 2 || (s.Length > 0 && s.All(c => char.IsDigit(c))));
diff --git a/Elwig/Models/Season.cs b/Elwig/Models/Season.cs
new file mode 100644
index 0000000..a59f7f6
--- /dev/null
+++ b/Elwig/Models/Season.cs
@@ -0,0 +1,46 @@
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models {
+    [Table("season"), PrimaryKey("Year")]
+    public class Season {
+        [Column("year")]
+        public int Year { get; set; }
+
+        [Column("currency")]
+        public string CurrencyCode { get; set; }
+
+        [Column("precision")]
+        public int Precision { get; set; }
+
+        [Column("start_date")]
+        public string? StartDateString { get; set; }
+
+        [NotMapped]
+        public DateOnly? StartDate {
+            get {
+                return StartDateString != null ? DateOnly.ParseExact(StartDateString, "yyyy-MM-dd") : null;
+            }
+            set {
+                StartDateString = value?.ToString("yyyy-MM-dd");
+            }
+        }
+
+        [Column("end_date")]
+        public string? EndDateString { get; set; }
+
+        [NotMapped]
+        public DateOnly? EndDate {
+            get {
+                return EndDateString != null ? DateOnly.ParseExact(EndDateString, "yyyy-MM-dd") : null;
+            }
+            set {
+                EndDateString = value?.ToString("yyyy-MM-dd");
+            }
+        }
+
+        [ForeignKey("CurrencyCode")]
+        public virtual Currency Currency { get; private set; }
+    }
+}
diff --git a/Elwig/Models/WineQual.cs b/Elwig/Models/WineQual.cs
index f9d413f..2b6680e 100644
--- a/Elwig/Models/WineQual.cs
+++ b/Elwig/Models/WineQual.cs
@@ -1,4 +1,5 @@
-using Microsoft.EntityFrameworkCore;
+using Elwig.Helpers;
+using Microsoft.EntityFrameworkCore;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Elwig.Models {
@@ -10,13 +11,16 @@ namespace Elwig.Models {
         [Column("origin_level")]
         public int? OriginLevel { get; private set; }
 
+        [Column("predicate")]
+        public bool IsPredicate { get; private set; }
+
+        [Column("min_kmw")]
+        public double? MinKmw { get; private set; }
+
+        [NotMapped]
+        public double? MinOe => MinKmw != null ? Utils.KmwToOe((double)MinKmw) : null;
+
         [Column("name")]
         public string Name { get; private set; }
-
-        [Column("from_kmw")]
-        public double? FromKmw { get; private set; }
-
-        [Column("to_kmw")]
-        public double? ToKmw { get; private set; }
     }
 }
diff --git a/Elwig/Windows/AreaCommAdminWindow.xaml b/Elwig/Windows/AreaComAdminWindow.xaml
similarity index 99%
rename from Elwig/Windows/AreaCommAdminWindow.xaml
rename to Elwig/Windows/AreaComAdminWindow.xaml
index cc21a7d..166598b 100644
--- a/Elwig/Windows/AreaCommAdminWindow.xaml
+++ b/Elwig/Windows/AreaComAdminWindow.xaml
@@ -1,4 +1,4 @@
-<local:AdministrationWindow x:Class="Elwig.Windows.AreaCommAdminWindow"
+<local:AdministrationWindow x:Class="Elwig.Windows.AreaComAdminWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
diff --git a/Elwig/Windows/AreaCommAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
similarity index 90%
rename from Elwig/Windows/AreaCommAdminWindow.xaml.cs
rename to Elwig/Windows/AreaComAdminWindow.xaml.cs
index fd5a1e1..69ac3ee 100644
--- a/Elwig/Windows/AreaCommAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -5,18 +5,17 @@ using System.Windows;
 using System.Windows.Controls;
 using Elwig.Helpers;
 using Elwig.Models;
-using System.Runtime.CompilerServices;
 using System;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
 
 namespace Elwig.Windows {
-    public partial class AreaCommAdminWindow : AdministrationWindow {
+    public partial class AreaComAdminWindow : AdministrationWindow {
         private readonly Member member;
         private bool IsEditing = false;
         private bool IsCreating = false;
 
-        public AreaCommAdminWindow(Member member) {
+        public AreaComAdminWindow(Member member) {
             InitializeComponent();
             this.member = member;
             Title = $"Flächenbindungen - {member.FamilyName} {member.GivenName} - Elwig";
@@ -57,7 +56,7 @@ namespace Elwig.Windows {
             if (contracts.Count == 1)
                 ContractList.SelectedIndex = 0;
 
-            //TODO notwendig?
+            // TODO notwendig?
             await RefreshAreaCommitmentList();
             RefreshInputs();
         }
@@ -70,10 +69,10 @@ namespace Elwig.Windows {
                 return;
             }
 
-            List<AreaCommitment> commitments = await Context.AreaCommitments.Where(a => a.VNr == contract.VNr).ToListAsync();
+            List<AreaComParcel> parcels = (await Context.AreaCommitments.FindAsync(contract.VNr)).Parcels.ToList();
 
-            AreaCommitmentList.ItemsSource = commitments;
-            if (commitments.Count == 1)
+            AreaCommitmentList.ItemsSource = parcels;
+            if (parcels.Count == 1)
                 AreaCommitmentList.SelectedIndex = 0;
             RefreshInputs();
         }
@@ -81,7 +80,7 @@ namespace Elwig.Windows {
         private void RefreshInputs(bool validate = false) {
             ClearInputStates();
             Contract? c = (Contract)ContractList.SelectedItem;
-            AreaCommitment? a = (AreaCommitment)AreaCommitmentList.SelectedItem;
+            AreaComParcel? a = (AreaComParcel)AreaCommitmentList.SelectedItem;
 
             if (c != null) {
                 DeleteContractButton.IsEnabled = true;
@@ -105,22 +104,23 @@ namespace Elwig.Windows {
             GC.Collect();
         }
 
-        private void FillInputs(AreaCommitment a) {
+        private void FillInputs(AreaComParcel a) {
             ClearOriginalValues();
 
             VNrInput.Text = a.VNr.ToString();
-            MgNrInput.Text = a.Contract.MgNr.ToString();
-            YearFromInput.Text = a.Contract.YearFrom.ToString();
-            YearToInput.Text = a.Contract.YearTo.ToString();
+            MgNrInput.Text = a.AreaCom.Contract.MgNr.ToString();
+            YearFromInput.Text = a.AreaCom.Contract.YearFrom.ToString();
+            YearToInput.Text = a.AreaCom.Contract.YearTo.ToString();
 
             KgInput.SelectedItem = a.Kg.Kg;
             RdInput.SelectedItem = a.Rd;
             GstNrInput.Text = a.GstNr;
             AreaInput.Text = a.Area.ToString();
 
-            SortInput.SelectedItem = a.WineVar;
-            AttrInput.SelectedItem = a.WineAttr;
-            CultInput.SelectedItem = a.WineCult;
+            SortInput.SelectedItem = a.AreaCom.WineVar;
+            // FIXME
+            //AttrInput.SelectedItem = a.WineAttr;
+            CultInput.SelectedItem = a.AreaCom.WineCult;
 
             FillOriginalValues();
         }
@@ -155,12 +155,12 @@ namespace Elwig.Windows {
         }
 
         private async void DeleteAreaCommitmentButton_Click(object sender, RoutedEventArgs evt) {
-            AreaCommitment a = (AreaCommitment)AreaCommitmentList.SelectedItem;
+            AreaComParcel a = (AreaComParcel)AreaCommitmentList.SelectedItem;
             if (a == null) return;
 
             var r = MessageBox.Show(
-                $"Soll die Flächenbindung {a.Kg.Kg.Name}{(a.Rd.Name == null ? "" : $", {a.Rd.Name}")}, {a.GstNr} wirklich unwiderruflich gelöscht werden?",
-                "Flächenbindung löschen", MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
+                $"Soll die Parzelle {a.GstNr} ({a.Area} m²) wirklich unwiderruflich gelöscht werden?",
+                "Parzelle löschen", MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
             if (r == MessageBoxResult.Yes) {
                 Context.Remove(a);
                 Context.SaveChanges();
@@ -186,7 +186,7 @@ namespace Elwig.Windows {
             if (c == null) return;
 
             var r = MessageBox.Show(
-                $"Soll der Vertrag \"{c.VNr} und alle enthaltenen Flächenbindungen wirklich unwiderruflich gelöscht werden?",
+                $"Soll der Vertrag {c.VNr} und alle enthaltenen Parzellen wirklich unwiderruflich gelöscht werden?",
                 "Vertrag löschen", MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
             if (r == MessageBoxResult.Yes) {
                 Context.Remove(c);
@@ -226,17 +226,18 @@ namespace Elwig.Windows {
             return c;
         }
 
-        private async Task<AreaCommitment> UpdateaAreaCommitment(AreaCommitment a) {
+        private async Task<AreaComParcel> UpdateaAreaComParcel(AreaComParcel a) {
             a.VNr = int.Parse(VNrInput.Text);
             a.KgNr = ((AT_Kg)KgInput.SelectedItem).KgNr;
             a.RdNr = ((WbRd)RdInput.SelectedItem).RdNr;
             a.GstNr = GstNrInput.Text;
             a.Area = int.Parse(AreaInput.Text);
-            a.SortId = ((WineVar)SortInput.SelectedItem).SortId;
-            a.AttrId = ((WineAttr)AttrInput.SelectedItem).AttrId;
-            a.CultId = ((WineCult)CultInput.SelectedItem).CultId;
+            a.AreaCom.SortId = ((WineVar)SortInput.SelectedItem).SortId;
+            // FIXME
+            //a.AttrId = ((WineAttr)AttrInput.SelectedItem).AttrId;
+            a.AreaCom.CultId = ((WineCult)CultInput.SelectedItem).CultId;
 
-            EntityEntry<AreaCommitment>? tr = null;
+            EntityEntry<AreaComParcel>? tr = null;
             try {
                 if (IsEditing) {
                     tr = Context.Update(a);
@@ -257,7 +258,7 @@ namespace Elwig.Windows {
 
         private async void AreaCommitmentSaveButton_Click(object sender, RoutedEventArgs evt) {
             Contract c = await UpdateContract((Contract)ContractList.SelectedItem);
-            AreaCommitment a = await UpdateaAreaCommitment(IsEditing ? (AreaCommitment)AreaCommitmentList.SelectedItem : Context.CreateProxy<AreaCommitment>());
+            AreaComParcel a = await UpdateaAreaComParcel(IsEditing ? (AreaComParcel)AreaCommitmentList.SelectedItem : Context.CreateProxy<AreaComParcel>());
 
             IsEditing = false;
             IsCreating = false;
@@ -297,7 +298,7 @@ namespace Elwig.Windows {
 
         private async void ContractSaveButton_Click(object sender, RoutedEventArgs evt) {
             Contract c = await UpdateContract(Context.CreateProxy<Contract>());
-            AreaCommitment a = await UpdateaAreaCommitment(Context.CreateProxy<AreaCommitment>());
+            AreaComParcel a = await UpdateaAreaComParcel(Context.CreateProxy<AreaComParcel>());
 
             IsEditing = false;
             IsCreating = false;
diff --git a/Elwig/Windows/MemberAdminWindow.xaml.cs b/Elwig/Windows/MemberAdminWindow.xaml.cs
index 450c784..5e0639b 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml.cs
+++ b/Elwig/Windows/MemberAdminWindow.xaml.cs
@@ -189,7 +189,7 @@ namespace Elwig.Windows {
         }
 
         private void AreaCommitmentButton_Click(object sender, RoutedEventArgs evt) {
-            var w = new AreaCommAdminWindow((Member)MemberList.SelectedItem);
+            var w = new AreaComAdminWindow((Member)MemberList.SelectedItem);
             w.Show();
         }
 
@@ -281,8 +281,8 @@ namespace Elwig.Windows {
 
             // TODO Rechnungsadresse
 
-            m.EntryDate = (EntryDateInput.Text == "") ? null : string.Join("-", EntryDateInput.Text.Split(".").Reverse());
-            m.ExitDate = (ExitDateInput.Text == "") ? null : string.Join("-", ExitDateInput.Text.Split(".").Reverse());
+            m.EntryDateString = (EntryDateInput.Text == "") ? null : string.Join("-", EntryDateInput.Text.Split(".").Reverse());
+            m.ExitDateString = (ExitDateInput.Text == "") ? null : string.Join("-", ExitDateInput.Text.Split(".").Reverse());
             m.BusinessShares = (BusinessSharesInput.Text == "") ? 0 : int.Parse(BusinessSharesInput.Text);
             m.AccountingNr = (AccountingNrInput.Text == "") ? null : AccountingNrInput.Text;
             m.IsActive = ActiveInput.IsChecked ?? false;
@@ -372,8 +372,8 @@ namespace Elwig.Windows {
                 BillingOrtInput.SelectedItem = null;
             }
 
-            EntryDateInput.Text = (m.EntryDate != null) ? string.Join(".", m.EntryDate.Split("-").Reverse()) : null;
-            ExitDateInput.Text = (m.ExitDate != null) ? string.Join(".", m.ExitDate.Split("-").Reverse()) : null;
+            EntryDateInput.Text = (m.EntryDateString != null) ? string.Join(".", m.EntryDateString.Split("-").Reverse()) : null;
+            ExitDateInput.Text = (m.ExitDateString != null) ? string.Join(".", m.ExitDateString.Split("-").Reverse()) : null;
             BusinessSharesInput.Text = m.BusinessShares.ToString();
             AccountingNrInput.Text = m.AccountingNr;
             BranchInput.SelectedItem = m.Branch;