diff --git a/pyproject.toml b/pyproject.toml
index 2da1747..0c32d71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "rtmilk"
-version = "3.0.0"
+version = "3.0.1"
 description = "Remember The Milk API wrapper"
 maintainers = [
 	{ name = "Rehan Khwaja", email = "rehan@khwaja.name" }
diff --git a/src/rtmilk/_sansio.py b/src/rtmilk/_sansio.py
index 23bc147..7ec5a71 100644
--- a/src/rtmilk/_sansio.py
+++ b/src/rtmilk/_sansio.py
@@ -303,7 +303,9 @@ def In(self, timeline: str, list_id: str, taskseries_id: str, task_id: str, due:
 		if 'has_due_time' in kwargs:
 			kwargs['has_due_time'] = '1' if kwargs['has_due_time'] else '0'
 		if 'due' in kwargs:
-			if isinstance(kwargs['due'], (date, datetime)):
+			if isinstance(kwargs['due'], datetime):
+				kwargs['due'] = _RtmDatetime(kwargs['due'])
+			elif isinstance(kwargs['due'], date):
 				kwargs['due'] = _RtmDate(kwargs['due'])
 			else:
 				assert isinstance(kwargs['due'], str)
@@ -340,7 +342,9 @@ def In(self, timeline: str, list_id: str, taskseries_id: str, task_id: str, star
 		if 'has_start_time' in kwargs:
 			kwargs['has_start_time'] = '1' if kwargs['has_start_time'] else '0'
 		if 'start' in kwargs:
-			if isinstance(kwargs['start'], (date, datetime)):
+			if isinstance(kwargs['start'], datetime):
+				kwargs['start'] = _RtmDatetime(kwargs['start'])
+			elif isinstance(kwargs['start'], date):
 				kwargs['start'] = _RtmDate(kwargs['start'])
 			else:
 				assert isinstance(kwargs['start'], str)
diff --git a/src/rtmilk/client.py b/src/rtmilk/client.py
index 58d987c..ecc5e36 100644
--- a/src/rtmilk/client.py
+++ b/src/rtmilk/client.py
@@ -53,6 +53,13 @@ async def DeleteAsync(self):
 def FilterDate(date_):
 	return datetime.strftime(date_, '%m/%d/%Y')
 
+def _LoadDate(rtmDate, hasTime):
+	if rtmDate is None:
+		return None
+	if hasTime:
+		return rtmDate
+	return rtmDate.date()
+
 def _CreateFromTaskSeries(client, listId, taskSeries):
 	_log.info(f'{taskSeries=}')
 	task0 = taskSeries.task[0]
@@ -60,8 +67,8 @@ def _CreateFromTaskSeries(client, listId, taskSeries):
 
 	result.name._LoadValue(taskSeries.name)
 	result.tags._LoadValue(set(taskSeries.tags.tag) if hasattr(taskSeries.tags, 'tag') else set(taskSeries.tags))
-	result.startDate._LoadValue(task0.start.date() if task0.start is not None else None) # None means no change
-	result.dueDate._LoadValue(task0.due.date() if task0.due is not None else None) # None means no change
+	result.startDate._LoadValue(_LoadDate(task0.start, task0.has_start_time))
+	result.dueDate._LoadValue(_LoadDate(task0.due, task0.has_due_time))
 	result.complete._LoadValue(task0.completed is not None)
 	result.notes._LoadValue([] if isinstance(taskSeries.notes, list) else taskSeries.notes.note)
 	result.createTime = taskSeries.created
diff --git a/tests/test_client.py b/tests/test_client.py
index 344e487..cafce78 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -1,4 +1,4 @@
-from datetime import date, timedelta
+from datetime import date, datetime, time, timedelta, timezone
 from uuid import uuid4
 
 from pydantic import ValidationError
@@ -58,6 +58,18 @@ def testClientSync(client):
 	assert newTaskToo.startDate.value == dueDate, 'Start date should have been updated'
 	assert newTaskToo.dueDate.value is None, 'Due date should have been updated'
 
+	# Update dates to datetimes
+	startDateTime = datetime.combine(dueDate, time(12, 42, 0), timezone.utc) # RTM discards the seconds
+	newTask.startDate.Set(startDateTime)
+	dueDateTime = datetime.combine(dueDate, time(13, 43, 0), timezone.utc) # RTM discards the seconds
+	newTask.dueDate.Set(dueDateTime)
+
+	tasksWithTitle = client.Get(f'name:"{name}"')
+	newTaskToo = tasksWithTitle[0]
+	assert len(tasksWithTitle) == 1, f'Should be only 1 task with name: "{name}"\n{tasksWithTitle}'
+	assert newTaskToo.startDate.value == startDateTime, 'Start date should have been updated with the time'
+	assert newTaskToo.dueDate.value == dueDateTime, 'Due date should have been updated with the time'
+
 	newTaskToo.Delete()
 
 @mark.asyncio