diff --git a/API/Controllers/EventController.cs b/API/Controllers/EventController.cs
index 03e3257..afd6236 100644
--- a/API/Controllers/EventController.cs
+++ b/API/Controllers/EventController.cs
@@ -16,7 +16,7 @@ namespace API.Controllers
 		public EventController(ILogger<EventController> logger, UserService userService, EventService service) : base(logger, userService, service)
 		{
 		}
-		
+
 		//todo slow
 		[HttpGet("period")]
 		public virtual ActionResult<List<EventDTO>> getPeriod(DateTime start, DateTime end)
@@ -24,20 +24,22 @@ namespace API.Controllers
 			MUser? user = getUser(User);
 			if (user == null)
 				return Unauthorized();
-		
-			IEnumerable<Event>? result = Service.get(user, x=> x.when >= start && x.when <= end);
+
+			IEnumerable<Event>? result = Service.get(user, x => x.when >= start && x.when <= end && x.hidden == false);
 			if (result == null)
 				return Forbid();
-		
+
 			List<EventDTO> dtos = [];
-		
-			Parallel.ForEach(result.ToList(), item =>
+
+			List<Event> temp = result.ToList();
+
+			Parallel.ForEach(temp, item =>
 			{
 				EventDTO dto = new EventDTO();
 				dto.adaptFromModel(item);
 				dtos.Add(dto);
 			});
-		
+
 			return Ok(dtos);
 		}