docs: def in_hours(self, when):
  		"""
  		Find if the given :class:`~datetime.datetime` is in business hours for
  		this office.
  
  		:param datetime.datetime when: The time to check
  
  		:returns: True if the given time is in business hours for the office, False otherwise.
  		:rtype: bool
  
  		"""
  
  		# convert to local timezone
  		when = when.astimezone(self.tz)
  
  		# is it a work day?
  		if when.weekday() not in self.hours:
  			# not a work day
  			return False
  
  		# work out if it is one of the ranges
  		for start, end in self.hours[when.weekday()]:
  			if start <= when.time() <= end:
  				# it's in that range
  
  				# is it a public holiday?  check if it is any range
  				for hstart, hend in self.holidays:
  					if when >= hstart and when <= hend:
  						# it's inside a holiday area.
  						return False
  
  				# not in a holiday zone, which means it's business time.
  				return True
  
  		# not in any range of hours, and was on a work day
  		return False