"""Test days module."""
 from unittest import TestCase
+from datetime import datetime
 from plomtask.days import Day
 from plomtask.misc import HandledException
 
         """Test Day's date format.."""
         with self.assertRaises(HandledException):
             Day('foo')
+        with self.assertRaises(HandledException):
             Day(None)
+        with self.assertRaises(HandledException):
             Day(3)
+        with self.assertRaises(HandledException):
             Day('2024-02-30')
+        with self.assertRaises(HandledException):
+            Day('2024-02-01 23:00:00')
+        self.assertEqual(datetime(2024, 1, 1), Day('2024-01-01').datetime)
 
     def test_Day_weekday(self):
         """Test Day.weekday."""