https://github.com/karlicoss/orgparse/blob/becddb11f9d113f98ac2b45c9348fb0f3d51b4e2/orgparse/date.py#L319 There is a bug that comes from some errors while changing from `get_start()` method to `start` attribute (made in commit https://github.com/karlicoss/orgparse/commit/e2c964c94ff2ed28215e4d484401e17416410e4a )