add Light control

AwesomeUIWidgets/Assets/Scripts/DateAndTimePicker.cs

                                     mode: CupertinoDatePickerMode.dateAndTime,
                                     initialDateTime: this.dateTime,
                                     onDateTimeChanged: (DateTime newDateTime) => {
-                                        this.setState(() => this.dateTime = newDateTime);
+                                        this.setState(() =>
+                                        {
+                                            LightManager.time = newDateTime;
+                                            this.dateTime = newDateTime;
+                                        });
                                     }
                                 )
                             ));

AwesomeUIWidgets/Assets/Scripts/LightManager.cs

+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class LightManager : MonoBehaviour
+{
+    public GameObject directLight;
+
+    public static DateTime time;
+    
+    private const float one_day_seconds = 86400f;
+    private const float offset = 0.0f;
+    // Start is called before the first frame update
+    void Start()
+    {
+        time = DateTime.Now;
+        Debug.Log(time.TimeOfDay);
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+        DateTime start_of_today = new DateTime(time.Year, time.Month, time.Day);
+        TimeSpan timeSpan = time - start_of_today;
+        float total_seconds = (float)timeSpan.TotalSeconds;
+        float x = (total_seconds - 21600) *180 / 43200 - offset;
+        if (x > 180) x = 180;
+        if (x < 0) x = 0;
+        directLight.transform.rotation = Quaternion.Euler(x,72,0);
+        if (x > 90) x = 180 - x;
+        directLight.GetComponent<Light>().intensity = x / 90;
+    }
+}