Support datetimes on DatetimePicker (#2135)

panel/models/datetime_picker.py

@@ -2,6 +2,7 @@
 from bokeh.core.properties import (
     Bool,
     Date,
+    Datetime,
     Either,
     Enum,
     List,
@@ -21,23 +22,23 @@ class DatetimePicker(InputWidget):
     The initial or picked date.
     """)
 
-    min_date = Nullable(Date, help="""
+    min_date = Nullable(Either(Date, Datetime), help="""
     Optional earliest allowable date.
     """)
 
-    max_date = Nullable(Date, help="""
+    max_date = Nullable(Either(Date, Datetime), help="""
     Optional latest allowable date.
     """)
 
-    disabled_dates = List(Either(Date, Tuple(Date, Date)), default=[], help="""
+    disabled_dates = List(Either(Date, Datetime, Tuple(Date, Date), Tuple(Datetime, Datetime)), default=[], help="""
     A list of dates of ``(start, end)`` date ranges to make unavailable for
     selection. All other dates will be avalable.
 
     .. note::
         Only one of ``disabled_dates`` and ``enabled_dates`` should be specified.
     """)
 
-    enabled_dates = List(Either(Date, Tuple(Date, Date)), default=[], help="""
+    enabled_dates = List(Either(Date, Datetime, Tuple(Date, Date), Tuple(Datetime, Datetime)), default=[], help="""
     A list of dates of ``(start, end)`` date ranges to make available for
     selection. All other dates will be unavailable.