diff --git a/PARR.BLL/ParrBllInstaller.cs b/PARR.BLL/ParrBllInstaller.cs
index 0796fbdb..04e94e80 100644
--- a/PARR.BLL/ParrBllInstaller.cs
+++ b/PARR.BLL/ParrBllInstaller.cs
@@ -21,6 +21,7 @@ namespace PARR.BLL
             services.AddHttpClient<IMqAdminService, MqAdminService>();
             services.AddTransient<ITransformService, TransformService>();
             services.AddTransient<IIntervalService, IntervalService>();
+            services.AddTransient<ICalendarService, CalendarService>();
         }
     }
 }
diff --git a/PARR.BLL/Services/Implementations/CalendarService.cs b/PARR.BLL/Services/Implementations/CalendarService.cs
new file mode 100644
index 00000000..be7904df
--- /dev/null
+++ b/PARR.BLL/Services/Implementations/CalendarService.cs
@@ -0,0 +1,69 @@
+using PARR.BLL.Services.Interfaces;
+
+namespace PARR.BLL.Services.Implementations
+{
+    public delegate Task<List<DateOnly>> GetWeekendsDelegate(DateOnly start, DateOnly end);
+
+
+    internal class CalendarService : ICalendarService
+    {
+
+        private DateOnly GetEndPeriodDate(DateOnly startPeriod, TimeSpan distributionPeriod)
+        {
+            return startPeriod.AddDays(distributionPeriod.Days).AddDays(-1);
+        }
+
+
+        public async Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, GetWeekendsDelegate getWeekends)
+        {
+            var endPeriod = GetEndPeriodDate(startPeriod, distributionPeriod);
+
+
+            var weekends = await getWeekends.Invoke(startPeriod, endPeriod);
+
+            //TODO: logic!!!
+
+            //временно сделаем список руками рабочих дней
+            var workDates = new List<DateOnly>();
+
+
+            return workDates;
+        }
+    }
+
+
+    public class Test
+    {
+        private readonly ICalendarService calendarService;
+
+        public Test(ICalendarService calendarService)
+        {
+            this.calendarService = calendarService;
+        }
+
+
+        public async void Ttt()
+        {
+            var tService = new TestService();
+           // var endPeriod = calendarService.GetEndPeriodDate(new DateOnly(2024, 1, 1), TimeSpan.Parse("30:00:00:00"));
+
+            var workDays = await calendarService.GetWorkDatesForPeriodAsync(new DateOnly(2024, 1, 1), TimeSpan.Parse("30:00:00:00"), tService.GetWeekendsAsync);
+
+
+        }
+
+
+    }
+
+
+    public class TestService
+    {
+        public async Task<List<DateOnly>> GetWeekendsAsync(DateOnly start, DateOnly end)
+        {
+
+            await Task.Delay(1000);
+
+            return new List<DateOnly> { new DateOnly(2024, 1, 12) };
+        }
+    }
+}
diff --git a/PARR.BLL/Services/Interfaces/ICalendarService.cs b/PARR.BLL/Services/Interfaces/ICalendarService.cs
new file mode 100644
index 00000000..82add0bd
--- /dev/null
+++ b/PARR.BLL/Services/Interfaces/ICalendarService.cs
@@ -0,0 +1,13 @@
+
+using PARR.BLL.Services.Implementations;
+
+namespace PARR.BLL.Services.Interfaces
+{
+    public interface ICalendarService
+    {
+        
+        Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, GetWeekendsDelegate getWeekends);
+        //Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, Action<List<DateOnly>> getWeekends);
+        //Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, Action getWeekends);
+    }
+}
diff --git a/PARR.Test/Worker.cs b/PARR.Test/Worker.cs
index 233dccbf..ac308c9b 100644
--- a/PARR.Test/Worker.cs
+++ b/PARR.Test/Worker.cs
@@ -11,16 +11,19 @@ namespace PARR.Test
         private readonly ILogger<Worker> _logger;
         private readonly IEsppApiService esppApiService;
         private readonly IIntervalService intervalService;
+        private readonly ICalendarService calendarService;
 
         public Worker(
             ILogger<Worker> logger,
             IEsppApiService esppApiService,
-            IIntervalService intervalService
+            IIntervalService intervalService,
+            ICalendarService calendarService
             )
         {
             _logger = logger;
             this.esppApiService = esppApiService;
             this.intervalService = intervalService;
+            this.calendarService = calendarService;
         }
 
         protected override async Task ExecuteAsync(CancellationToken stoppingToken)
@@ -33,7 +36,14 @@ namespace PARR.Test
 
             #endregion
 
+            #region Calendar
 
+            var testCalendar = new BLL.Services.Implementations.Test(calendarService);
+
+            testCalendar.Ttt() ;
+
+
+            #endregion
 
 
             ////test interval