+ @property
+ def prev_date(self):
+ """Return date preceding date of this Day."""
+ prev_datetime = self.datetime - timedelta(days=1)
+ return prev_datetime.strftime(DATE_FORMAT)
+
+ @property
+ def next_date(self):
+ """Return date succeeding date of this Day."""
+ next_datetime = self.datetime + timedelta(days=1)
+ return next_datetime.strftime(DATE_FORMAT)
+