Phileas Fogg had accomplished the journey round the world in eighty days!

Phileas Fogg had won his wager of twenty thousand pounds!

How was it that a man so exact and fastidious could have made this error of a day? How came he to think that he had arrived in London on Saturday, the twenty-first day of December, when it was really Friday, the twentieth, the seventy-ninth day only from his departure?

The cause of the error is very simple.

Phileas Fogg had, without suspecting it, gained one day on his journey, and this merely because he had travelled constantly eastward; he would, on the contrary, have lost a day had he gone in the opposite direction, that is, westward.