diff --git a/AsbCloudApp/Requests/MessageRequest.cs b/AsbCloudApp/Requests/MessageRequest.cs
index 1bfba1a2..a474c7b9 100644
--- a/AsbCloudApp/Requests/MessageRequest.cs
+++ b/AsbCloudApp/Requests/MessageRequest.cs
@@ -17,12 +17,12 @@ namespace AsbCloudApp.Requests
         /// <summary>
         /// начальная дата
         /// </summary>
-        public DateTime? Begin { get; set; }
+        public DateTimeOffset? Begin { get; set; }
 
         /// <summary>
         /// конечная дата
         /// </summary>
-        public DateTime? End { get; set; }
+        public DateTimeOffset? End { get; set; }
 
         /// <summary>
         /// строка поиска
diff --git a/AsbCloudInfrastructure/Services/SAUB/MessageService.cs b/AsbCloudInfrastructure/Services/SAUB/MessageService.cs
index 350829e1..a4d1f841 100644
--- a/AsbCloudInfrastructure/Services/SAUB/MessageService.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/MessageService.cs
@@ -72,13 +72,13 @@ namespace AsbCloudInfrastructure.Services.SAUB
 
             if (request.Begin is not null)
             {
-                var beginUtc = request.Begin.Value.ToUtcDateTimeOffset(timezone.Hours);
+                var beginUtc = request.Begin.Value.ToUniversalTime();
                 query = query.Where(m => m.DateTime >= beginUtc);
             }
 
             if (request.End is not null)
             {
-                var endUtc = request.End.Value.ToUtcDateTimeOffset(timezone.Hours);
+                var endUtc = request.End.Value.ToUniversalTime();
                 query = query.Where(m => m.DateTime <= endUtc);
             }