Do you work every day without observing a common weekly off day for all employees? If yes, you can give the new joiner their first weekly day off after 6 days of joining. In case you have a common weekly off, like Sunday, what will they do in your company alone without others? Think practically, and you will find an answer to your question. When everyone is off on Sunday, let them also have their first day off on Sunday. If you are unwilling to let an employee rest before completing 6 days of work, consider setting Monday as a common joining day so that all new joiners work for 6 days before their first weekly off. Since this person has already had a weekly off without completing 6 days of work, you can compensate when they leave by asking them to work till Saturday, using Saturday as their last working day without pay for the weekly off.