Practically, this question has no real significance whatever. Though it may puzzle the brain of one who has not before him the facts, it has been settled forever in a most remarkable manner by the usage of mankind. The fact is beyond cavil that, from the extreme eastern boundary of the eastern continent to the extreme western verge of the western continent, there is such a perfect agreement upon this point that each day of the week, commencing on the western shore of the Pacific, continues its course across Asia, Europe, and America, until it arrives at the eastern shore of the same sea. So true is this that, were there a line of churches surmounted with bells, in hearing distance of each other, they could ring in the commencement of any day; say at Yokohama in Japan, and its march could be made known along the whole line from that place to San Francisco by a like practice in each of the churches, without a solitary break until the last bell on the Pacific coast had announced its arrival there. Whether it be admitted that it can be done or not, it is a fact that the Christians from China to California do observe the same Sabbath or Sunday all along the line between the two points. Should it be replied that, although there is a uniform reckoning of the days to those passing from San Francisco eastward to China, or from China westward to San Francisco, that, nevertheless, should they cross the Pacific Ocean from San Francisco westward to China, or from China eastward to San Francisco, it would be necessary for them in the first case to add a day, and in the last, to drop one, in order to make their time harmonize with that of the people in these two countries, the reply is, that this is very true. It does not, however, prove that there is no definite day which can be kept alike by the inhabitants of the two continents; for in order to the keeping of the same day on a round world there must somewhere be a day-line, in other words, there must be a point where the day begins. In crossing that line the same result would ensue as that claimed in the passage from California to China _via_ the Pacific, _i. e._, a day must be either dropped or added in the reckoning of the individual making the transit.