When speaking with a co-worker of mine, who doesn't work during the weekends like me, I could tell him "Have a good weekend." before returning at home. If I tell him "Have a good weekend." on a different weekday, that would mean I will not see him again before Friday, or I think that is going to happen.
If I say "Have a good week." before leaving work, does that mean I will not see him for the rest of the week, or is that something I can say even if I will see him throughout the week?