Answer:
This is a foreshadowing of what actually happens in the rest of the play. A fateful chain of events ("consequence") does begin its appointed time ("date") that night, and that chain of events does terminate the duration ("expire the term") of Romeo's life with premature ("untimely") death. But, despite his premonitions, Romeo does go into Capulet's house. He says that he is doing so because he is entrusting his fate to "He, that hath the steerage of my course." "He" is presumably God, but Romeo seems more melodramatic than religious. Mercutio has lightheartedly urged him to be lighthearted, but Romeo has steadfastly held onto his image of himself as a victim of hopeless love and implacable fate.
Benvolio calls on the drum to strike, and they all march around the stage once to indicate that they have entered Capulet's house. Then servants appear, carrying away the remains of the supper, and the next scene begins.