diff --git a/Koogle.Application/Class1.cs b/Koogle.Application/Class1.cs
deleted file mode 100644
index ebefdfc..0000000
--- a/Koogle.Application/Class1.cs
+++ /dev/null
@@ -1,7 +0,0 @@
-namespace Koogle.Application
-{
-    public class Class1
-    {
-
-    }
-}
diff --git a/Koogle.Application/DTOs/DayDto.cs b/Koogle.Application/DTOs/DayDto.cs
new file mode 100644
index 0000000..883fa30
--- /dev/null
+++ b/Koogle.Application/DTOs/DayDto.cs
@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Koogle.Domain.Enums;
+
+namespace Koogle.Application.DTOs
+{
+    public record DayDto
+    {
+        public int Id { get; set; }
+
+        public DateTime PostDate { get; set; }
+
+        public DayStatus Status { get; set; }
+    }
+
+    public record DaySummaryDto
+    {
+        public int Id { get; set; }
+
+        public DateTime PostDate { get; set; }
+
+        public DayStatus Status { get; set; }
+    }
+
+    public record DayFilterDto
+    {
+        public int Year { get; set; }
+
+        ///// <summary>
+        ///// Sortierfeld.
+        ///// </summary>
+        //public GoalSortField SortBy { get; init; } = GoalSortField.Name;
+
+        ///// <summary>
+        ///// Sortierrichtung.
+        ///// </summary>
+        //public SortDirection SortDirection { get; init; } = SortDirection.Ascending;
+
+        // Paginierung
+
+        /// <summary>
+        /// Seitennummer (1-basiert).
+        /// </summary>
+        public int Page { get; init; } = 1;
+
+        /// <summary>
+        /// Anzahl der Einträge pro Seite.
+        /// </summary>
+        public int PageSize { get; init; } = 20;
+
+        /// <summary>
+        /// Berechnet den Skip-Wert für die Paginierung.
+        /// </summary>
+        public int Skip => (Page - 1) * PageSize;
+    }
+}
diff --git a/Koogle.Application/DTOs/PagedResultDto.cs b/Koogle.Application/DTOs/PagedResultDto.cs
new file mode 100644
index 0000000..5003d01
--- /dev/null
+++ b/Koogle.Application/DTOs/PagedResultDto.cs
@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Koogle.Application.DTOs
+{
+    /// <summary>
+    /// Ergebnis einer paginierten Abfrage.
+    /// </summary>
+    /// <typeparam name="T">Typ der Ergebnisse.</typeparam>
+    public record PagedResultDto<T>
+    {
+        /// <summary>
+        /// Die Ergebnisse der aktuellen Seite.
+        /// </summary>
+        public IReadOnlyList<T> Items { get; init; } = [];
+
+        /// <summary>
+        /// Gesamtanzahl der Ergebnisse (über alle Seiten).
+        /// </summary>
+        public int TotalCount { get; init; }
+
+        /// <summary>
+        /// Aktuelle Seitennummer.
+        /// </summary>
+        public int Page { get; init; }
+
+        /// <summary>
+        /// Anzahl der Einträge pro Seite.
+        /// </summary>
+        public int PageSize { get; init; }
+
+        /// <summary>
+        /// Gesamtanzahl der Seiten.
+        /// </summary>
+        public int TotalPages => PageSize > 0 ? (int)Math.Ceiling((double)TotalCount / PageSize) : 0;
+
+        /// <summary>
+        /// Gibt an, ob es eine vorherige Seite gibt.
+        /// </summary>
+        public bool HasPreviousPage => Page > 1;
+
+        /// <summary>
+        /// Gibt an, ob es eine nächste Seite gibt.
+        /// </summary>
+        public bool HasNextPage => Page < TotalPages;
+    }
+}
diff --git a/Koogle.Application/DependencyInjection.cs b/Koogle.Application/DependencyInjection.cs
new file mode 100644
index 0000000..93da18e
--- /dev/null
+++ b/Koogle.Application/DependencyInjection.cs
@@ -0,0 +1,36 @@
+using Koogle.Application.Interfaces;
+using Koogle.Application.Services;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.Extensions.DependencyInjection;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Koogle.Application
+{
+    public static class DependencyInjection
+    {
+        public static IServiceCollection AddApplication(this IServiceCollection services)
+        {
+            // AutoMapper
+            services.AddAutoMapper(cfg => cfg.LicenseKey = "eyJhbGciOiJSUzI1NiIsImtpZCI6Ikx1Y2t5UGVubnlTb2Z0d2FyZUxpY2Vuc2VLZXkvYmJiMTNhY2I1OTkwNGQ4OWI0Y2IxYzg1ZjA4OGNjZjkiLCJ0eXAiOiJKV1QifQ.eyJpc3MiOiJodHRwczovL2x1Y2t5cGVubnlzb2Z0d2FyZS5jb20iLCJhdWQiOiJMdWNreVBlbm55U29mdHdhcmUiLCJleHAiOiIxNzk3MjkyODAwIiwiaWF0IjoiMTc2NTgyNzkzMyIsImFjY291bnRfaWQiOiIwMTliMjM4YjYxZGM3MWYwOTAyYmY5OGU0NzNmOTY5ZSIsImN1c3RvbWVyX2lkIjoiY3RtXzAxa2NocnF3dHNkczM4cjJnOTBncmZ5ajA1Iiwic3ViX2lkIjoiLSIsImVkaXRpb24iOiIwIiwidHlwZSI6IjIifQ.ehnUm61bFyXv2s0RScHd3vV2wIRivFN-phslB65UxztWBsk1EAtqTgPT55ONQ6-k7zi7G1vpLUUz9NL4EfpMRwgl1obeCTrs1pzvIRkednzrSdcPKAOmil-xiCS1TlrvaLzLnBWCr0JroGrAmtMYjsfUpYayRx9x8BzjUGBPUvb6eUR6wSbEtPzZbycgsp4Oj4Wwi23o56UGWHdNz7R8ofKy9EyzrgiG1uYfJZUDB_B5uWtdWi5M2bfoYHcLj-7VbSJlVlW2RoETEYuylBjG0Bwg_ZtSoVsCuqi_qV_GuyBOKbPpjFK4NFcInYFkAxAyzV_uTaFQpCFukPpCMZpFtA",
+            Assembly.GetExecutingAssembly());
+
+            // FluentValidation
+            //services.AddValidatorsFromAssembly(Assembly.GetExecutingAssembly());
+
+            // Application Services
+            services.AddScoped<IDayService, DayService>();
+            //services.AddScoped<IYearService, YearService>();
+            //services.AddScoped<ICompanyService, CompanyService>();
+            //services.AddScoped<IUserService, UserService>();
+            //services.AddScoped<ITagService, TagService>();
+            //services.AddScoped<IAuthorizationService, AuthorizationService>();
+
+            return services;
+        }
+    }
+}
diff --git a/Koogle.Application/Interfaces/IDayService.cs b/Koogle.Application/Interfaces/IDayService.cs
new file mode 100644
index 0000000..2300572
--- /dev/null
+++ b/Koogle.Application/Interfaces/IDayService.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Koogle.Application.DTOs;
+
+namespace Koogle.Application.Interfaces
+{
+    public interface IDayService
+    {
+        Task<PagedResultDto<DaySummaryDto>> GetAllAsync(DayFilterDto filter, CancellationToken cancellationToken = default);
+    }
+}
diff --git a/Koogle.Application/Koogle.Application.csproj b/Koogle.Application/Koogle.Application.csproj
index 125f4c9..5a2d68f 100644
--- a/Koogle.Application/Koogle.Application.csproj
+++ b/Koogle.Application/Koogle.Application.csproj
@@ -6,4 +6,13 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="AutoMapper" Version="15.1.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Koogle.Domain\Koogle.Domain.csproj" />
+    <ProjectReference Include="..\Koogle.Infrastrcuture\Koogle.Infrastrcuture.csproj" />
+  </ItemGroup>
+
 </Project>
diff --git a/Koogle.Application/Services/DayService.cs b/Koogle.Application/Services/DayService.cs
new file mode 100644
index 0000000..a43a6f3
--- /dev/null
+++ b/Koogle.Application/Services/DayService.cs
@@ -0,0 +1,135 @@
+using Koogle.Application.DTOs;
+using Koogle.Application.Interfaces;
+using Koogle.Domain.Interfaces;
+using KoogleApp.Data;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AutoMapper;
+using KoogleApp.Entities;
+
+namespace Koogle.Application.Services
+{
+    public class DayService : IDayService
+    {
+        private readonly IDbContextFactory<AppDbContext> _contextFactory;
+        private readonly IDayRepository _goalRepository;
+        private readonly ICurrentUserService _currentUserService;
+        private readonly IAuthorizationService _authorizationService;
+        private readonly IMapper _mapper;
+
+        public DayService(IDbContextFactory<AppDbContext> contextFactory,
+            IDayRepository goalRepository,
+            IMapper mapper)
+        {
+         
+        }
+        public async Task<PagedResultDto<DaySummaryDto>> GetAllAsync(DayFilterDto filter, CancellationToken cancellationToken = default)
+        {
+            await using var context = await _contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var query = context.Days
+                .Include(g => g.PostDate)
+                .Include(g => g.Status)
+                //.Include(g => g.ActualValues.Where(av => !av.IsDeleted))
+                .AsQueryable();
+
+            // Filter anwenden
+            query = ApplyFilters(query, filter);
+
+            // Gesamtanzahl ermitteln
+            var totalCount = await query.CountAsync(cancellationToken);
+
+            // Sortierung anwenden
+            //query = ApplySorting(query, filter);
+
+            // Paginierung anwenden
+            var goals = await query
+                .Skip(filter.Skip)
+                .Take(filter.PageSize)
+                .ToListAsync(cancellationToken);
+
+            var items = _mapper.Map<List<DaySummaryDto>>(goals);
+
+            return new PagedResultDto<DaySummaryDto>
+            {
+                Items = items,
+                TotalCount = totalCount,
+                Page = filter.Page,
+                PageSize = filter.PageSize
+            };
+        }
+
+        /// <summary>
+        /// Wendet Filter auf die Abfrage an.
+        /// </summary>
+        private static IQueryable<Day> ApplyFilters(IQueryable<Day> query, DayFilterDto filter)
+        {
+            //if (!string.IsNullOrWhiteSpace(filter.SearchTerm))
+            //{
+            //    var searchTerm = filter.SearchTerm.ToLower();
+            //    query = query.Where(g =>
+            //        g.Name.ToLower().Contains(searchTerm) ||
+            //        (g.Description != null && g.Description.ToLower().Contains(searchTerm)));
+            //}
+
+            //if (filter.CompanyId.HasValue)
+            //{
+            //    query = query.Where(g => g.CompanyId == filter.CompanyId.Value);
+            //}
+
+            //if (filter.CompanyIds?.Count > 0)
+            //{
+            //    query = query.Where(g => filter.CompanyIds.Contains(g.CompanyId));
+            //}
+
+            //if (filter.YearId.HasValue)
+            //{
+            //    query = query.Where(g => g.YearId == filter.YearId.Value);
+            //}
+
+            //if (filter.Year.HasValue)
+            //{
+            //    query = query.Where(g => g.Year.YearNumber == filter.Year.Value);
+            //}
+
+            //if (filter.GoalType.HasValue)
+            //{
+            //    query = query.Where(g => g.GoalType == filter.GoalType.Value);
+            //}
+
+            //if (filter.TagId.HasValue)
+            //{
+            //    query = query.Where(g => g.Tags.Any(t => t.Id == filter.TagId.Value));
+            //}
+
+            //if (filter.TagIds?.Count > 0)
+            //{
+            //    query = query.Where(g => g.Tags.Any(t => filter.TagIds.Contains(t.Id)));
+            //}
+
+            //if (filter.OwnerId.HasValue)
+            //{
+            //    query = query.Where(g => g.GoalOwners.Any(go => go.UserId == filter.OwnerId.Value));
+            //}
+
+            //if (filter.IsInherited.HasValue)
+            //{
+            //    query = filter.IsInherited.Value
+            //        ? query.Where(g => g.ParentGoalId != null)
+            //        : query.Where(g => g.ParentGoalId == null);
+            //}
+
+            //if (filter.IsRootGoal == true)
+            //{
+            //    query = query.Where(g => g.ParentGoalId == null);
+            //}
+
+            return query;
+        }
+    }
+}
diff --git a/Koogle.Infrastrcuture/DependencyInjection.cs b/Koogle.Infrastrcuture/DependencyInjection.cs
index e6c91f1..0e9077f 100644
--- a/Koogle.Infrastrcuture/DependencyInjection.cs
+++ b/Koogle.Infrastrcuture/DependencyInjection.cs
@@ -1,12 +1,40 @@
-using System;
+using KoogleApp.Data;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace Koogle.Infrastrcuture
 {
-    internal class DependencyInjection
+    public static class DependencyInjection
     {
+        public static IServiceCollection AddInfrastructure(this IServiceCollection services, 
+            IConfiguration configuration)
+        {
+            var connectionString = configuration.GetConnectionString("AppDb") ?? throw new InvalidOperationException("Connection string 'AppDb' not found.");
+
+            //services.AddDbContext<AppDbContext>(options =>
+            //    options.UseSqlServer(connectionString));
+
+            services.AddDatabaseDeveloperPageExceptionFilter();
+
+            services.AddIdentityCore<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
+                .AddEntityFrameworkStores<AppDbContext>()
+                .AddSignInManager()
+                .AddDefaultTokenProviders();
+
+            services.AddDbContextFactory<AppDbContext>(options =>
+                options.UseSqlServer(connectionString)
+            );
+
+            return services;
+        }
     }
 }
diff --git a/Koogle.Tests/ReducerTests/ThrowPanelStateTests.cs b/Koogle.Tests/ReducerTests/ThrowPanelStateTests.cs
index b29293b..d499131 100644
--- a/Koogle.Tests/ReducerTests/ThrowPanelStateTests.cs
+++ b/Koogle.Tests/ReducerTests/ThrowPanelStateTests.cs
@@ -17,7 +17,7 @@ namespace Koogle.Tests.ReducerTests
         {
             // Arrange
             var initialState = new ThrowPanelState();
-            var action = new StartStopAction(initialState, new TrainingSetupState());
+            var action = new StartStopAction(new TrainingSetupState());
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
@@ -31,7 +31,7 @@ namespace Koogle.Tests.ReducerTests
         {
             // Arrange
             var initialState = new ThrowPanelState();
-            var action = new StartStopAction(initialState, null);
+            var action = new StartStopAction(null);
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
@@ -469,7 +469,7 @@ namespace Koogle.Tests.ReducerTests
             // Arrange
             var initialState = new ThrowPanelState();
             var setupState = new TrainingSetupState() { ThrowMode = ThrowMode.Decrease };
-            var action = new StartStopAction(initialState, setupState);
+            var action = new StartStopAction(setupState);
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
@@ -484,7 +484,7 @@ namespace Koogle.Tests.ReducerTests
             // Arrange
             var initialState = new ThrowPanelState();
             var setupState = new TrainingSetupState() { ThrowsPerRound = 5 };
-            var action = new StartStopAction(initialState, setupState);
+            var action = new StartStopAction(setupState);
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
@@ -499,7 +499,7 @@ namespace Koogle.Tests.ReducerTests
             // Arrange
             var initialState = new ThrowPanelState();
             var setupState = new TrainingSetupState() { DayId = 123 };
-            var action = new StartStopAction(initialState, setupState);
+            var action = new StartStopAction(setupState);
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
@@ -514,7 +514,7 @@ namespace Koogle.Tests.ReducerTests
             // Arrange
             var initialState = new ThrowPanelState();
             var setupState = new TrainingSetupState();
-            var action = new StartStopAction(initialState, setupState);
+            var action = new StartStopAction(setupState);
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
@@ -528,7 +528,7 @@ namespace Koogle.Tests.ReducerTests
         {
             // Arrange
             var initialState = new ThrowPanelState() with { IsStated = true };
-            var action = new StartStopAction(initialState, null);
+            var action = new StartStopAction(null);
 
             // Act
             var newState = ThrowPanelStateReducer.OnStartStop(initialState, action);
diff --git a/KoogleApp/Program.cs b/KoogleApp/Program.cs
index e6a93a3..cacf5f4 100644
--- a/KoogleApp/Program.cs
+++ b/KoogleApp/Program.cs
@@ -1,3 +1,5 @@
+using Koogle.Application;
+using Koogle.Infrastrcuture;
 using KoogleApp.Components;
 using KoogleApp.Components.Account;
 using KoogleApp.Data;
@@ -39,8 +41,12 @@ builder.Services.AddAuthentication(options =>
     })
     .AddIdentityCookies();
 
+// Infrastructure Layer (DbContext, Repositories, CurrentUserService)
+builder.Services.AddInfrastructure(builder.Configuration);
+
+// Application Layer (Services, AutoMapper, Validators)
+builder.Services.AddApplication();
 
-builder.Services.AddDbServices(builder.Configuration);
 
 builder.Services.AddSingleton<IEmailSender<ApplicationUser>, IdentityNoOpEmailSender>();
 
diff --git a/KoogleApp/Services/ServiceExtension.cs b/KoogleApp/Services/ServiceExtension.cs
index e57737f..4d8c500 100644
--- a/KoogleApp/Services/ServiceExtension.cs
+++ b/KoogleApp/Services/ServiceExtension.cs
@@ -14,28 +14,6 @@ namespace KoogleApp.Services
 {
     public static class ServiceExtension
     {
-        public static IServiceCollection AddDbServices(this IServiceCollection services, IConfiguration configuration)
-        {
-            var connectionString = configuration.GetConnectionString("AppDb") ?? throw new InvalidOperationException("Connection string 'AppDb' not found.");
-
-            //services.AddDbContext<AppDbContext>(options =>
-            //    options.UseSqlServer(connectionString));
-
-            services.AddDatabaseDeveloperPageExceptionFilter();
-
-            services.AddIdentityCore<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
-                .AddEntityFrameworkStores<AppDbContext>()
-                .AddSignInManager()
-                .AddDefaultTokenProviders();
-
-            services.AddDbContextFactory<AppDbContext>(options =>
-                options.UseSqlServer(connectionString)
-            );
-
-
-            return services;
-        }
-
         public static IServiceCollection AddAppServices(this IServiceCollection services)
         {
             services.AddFluxor(x =>