ANSWER: The definition of a journey is nine hours by the clock. Should the
traveller stop in a place, anticipating that he will stay there for no
less than one month by the Bayan reckoning, it is incumbent on him to keep
the Fast; but if for less than one month, he is exempt from fasting. If he
arriveth during the Fast at a place where he is to stay one month
according to the Bayan, he should not observe the Fast till three days
have elapsed, thereafter keeping it throughout the remainder of its
course; but if he come to his home, where he hath heretofore been
permanently resident, he must commence his fast upon the first day after
his arrival.