Youmightsayhave a goodweekendoryoumightsayseeyouonMonday.
「良い週末を」または「月曜日に会いましょう」と言うかもしれません。
SoifyourworkweekgoesfromMondaytoFridayandit's around 4.30 orfive o'clockonFridayandyou'reabouttogohome, youwoulddefinitelysayhave a goodweekendorseeyouonMonday.