Where were you last Pluterday?
by Paul van Herck
Category: Science fiction, Belgian (French)

The theme in the book is Pluterday, an extra day in the week which can be withdrawn if one saves enough time (e.g. by taking a plane instead of a train). Only the rich can save enough time and thus Pluterday is in practice reserved for the "happy few", resulting in a class society. The existence of Pluterdays is kept secret to non-privileged people.