For instance, “if [these firms] close on Friday and give everyone the same day off, that makes coordination with clients, suppliers and the rest of the economy harder”, says Pedro Gomes, author of Friday is the new Saturday, and coordinator of an upcoming Portuguese government trial of the four-day workweek. “The alternative is to s off, so you maintain working five days, but then you need communication processes in teams to be able to deal with days when colleagues are not there.”