What time did the first spirit visit scrooge?

The ghost foretold by Jacob Marley appeared at One a.m. Marley states, "Without their visits," said the Ghost, "you cannot hope to shun the path I tread. Expect the first to-morrow, when the bell tolls One."

"Couldn't I take 'em all at once, and have it over, Jacob?" hinted Scrooge.

"Expect the second on the next night at the same hour. The third upon the next night when the last stroke of Twelve has ceased to vibrate".