def on(self, day: Arrow, strict: bool = False) -> Iterator[Event]:
"""Iterates (in chronological order) over all events that occurs on `day`
Args:
day (Arrow object)
strict (bool): if True events will be returned only if they are\
strictly *included* in `day`.
"""
day_start, day_stop = day.floor('day').span('day')
if strict:
return self.included(day_start, day_stop)
else:
return self.overlapping(day_start, day_stop)
