diff --git a/scripts/Player.cs b/scripts/Player.cs
index e47c5f7..ab9aedc 100644
--- a/scripts/Player.cs
+++ b/scripts/Player.cs
@@ -1,10 +1,14 @@
 using Godot;
 using System;
+using System.Collections.Generic;
 
 public partial class Player : Node
 {
-
-	public class BudgetType {
+	/// <summary>
+	/// 预算类型，用于记录项目预算的不同类别费用。
+	/// </summary>
+	public class BudgetType
+	{
 		/// <summary>
 		/// 设备费：用于购买设备，升级实验室是指在项目实施过程中购置或试制专用仪
 		/// 器设备，对现有仪器设备进行升级改造，以及租赁外单位仪器设备而发生的费
@@ -12,7 +16,7 @@ public partial class Player : Node
 		/// 置，鼓励开放共享、自主研制、租赁专用仪器设备以及对现有仪器设备进行升
 		/// 级改造，避免重复购置。
 		/// </summary>
-        public int Facility { get; set; }
+		public int Facility { get; set; }
 		/// <summary>
 		/// 业务费：是指项目实施过程中消耗的各种材料、辅助材料等低值易耗品的采
 		/// 购、运输、装卸、整理等费用，发生的测试化验加工、燃料动力、出版/文献/
@@ -30,15 +34,72 @@ public partial class Player : Node
 		/// <summary>
 		/// 总预算
 		/// </summary>
-        public int Total => Facility + Operational + Labor;
-    }
+		public int Total => Facility + Operational + Labor;
+	}
 
+	public class TimelineType
+	{
+		public DateOnly InternalDate { get; set; }
 
+		private Dictionary<DateOnly, HashSet<Guid>> _events;
+
+		public void Subscribe(DateOnly date, Guid eventUUID)
+		{
+			_events ??= new Dictionary<DateOnly, HashSet<Guid>>();
+			if (!_events.ContainsKey(date)) _events[date] = new HashSet<Guid>();
+			_events[date].Add(eventUUID);
+		}
+
+		public void Unsubscribe(DateOnly date, Guid eventUUID)
+		{
+			if (_events == null) return;
+			if (!_events.ContainsKey(date)) return;
+			_events[date].Remove(eventUUID);
+		}
+
+		private void NextDay()
+		{
+			if (_events == null) return;
+			_events.Remove(InternalDate);
+
+			InternalDate = InternalDate.AddDays(1);
+			OnDayChanged?.Invoke(InternalDate);
+			GD.Print("Today is: " + InternalDate.ToString("yyyy-MM-dd"));
+
+			if (_events.ContainsKey(InternalDate))
+			{
+				var events = _events[InternalDate];
+				foreach (var eventUUID in events)
+				{
+					// TODO: Trigger event
+					OnEventTriggered?.Invoke(InternalDate, eventUUID);
+					GD.Print("event triggered! eventUUID: " + eventUUID.ToString());
+				}
+			}
+		}
+
+		public void Attach(Timer ticker)
+		{
+			ticker.Timeout += NextDay;
+		}
+
+		public TimelineType(DateOnly startDate)
+		{
+			InternalDate = startDate;
+		}
+
+		public delegate void EventTriggeredEventHandler(DateOnly date, Guid eventUUID);
+
+		public event EventTriggeredEventHandler OnEventTriggered;
+
+		public delegate void DayChangedEventHandler(DateOnly date);
+
+		public event DayChangedEventHandler OnDayChanged;
+
+	}
 
-	/// <summary>
-	/// 预算类型，用于记录项目预算的不同类别费用。
-	/// </summary>
 	public static BudgetType Budget { get; set; }
+	public static readonly TimelineType Timeline = new(DateOnly.Parse("2024/11/17"));
 
 	/// <summary>
 	/// 名字
@@ -48,28 +109,24 @@ public partial class Player : Node
 	/// <summary>
 	/// 年龄
 	/// </summary>
-    public static uint Age { get; set; }
+	public static uint Age { get; set; }
 
 	/// <summary>
 	/// 日期
 	/// </summary>
-    public static DateOnly Date { get; set; }
+	public static DateOnly Date { get; set; }
 
-    // Called when the node enters the scene tree for the first time.
-    public override void _Ready()
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
 	{
 		var ticker = GetNode<Timer>("/root/GameManager/OneSecondTicker");
-		ticker.Timeout += OnTickerTimeout;
+		Timeline.Attach(ticker);
+		Timeline.Subscribe(DateOnly.Parse("2024/11/20"), Guid.NewGuid());
+		Timeline.OnEventTriggered += (d, e) => GD.Print($"Timeline event triggered: {d}, {e}");
 	}
 
 	// Called every frame. 'delta' is the elapsed time since the previous frame.
 	public override void _Process(double delta)
 	{
 	}
-
-	private static void OnTickerTimeout()
-	{
-		Date = DateOnly.FromDateTime(DateTime.Now);
-		GD.Print(Date.ToString());
-	}
 }