Isaiah 19:18

In that day -The word ‘day’ is used in Scripture in a large signification, “as including the whole period under consideration,” or the whole time that is embraced in the scope of a prophecy. In this chapter it is used in this sense; and evidently means that the event here foretold would take place “somewhere” in the period that is embraced in the design of the prophecy. That is, the event recorded in this verse would occur in the series of events that the prophet saw respecting Egypt (seeIsaiah 4:1). The sense is, that somewhere in the general time here designatedIsaiah 19:4-17, the event here described would take place.