As a freelancer, what is the best way to tell a client you are not available on weekends?

[Btaliat]

There is a need for the freelancers to know how to address their clients. There is a need to choose what we tell them. Knowing this will surely make them to have and retain some of these clients. Clients always like it when the freelancers treat them right. You need to know how to talk in a way that will not hurt their feelings. What do you think about this? Ensure that you tell them in a way that they will understand you.