From Longman Dictionary of Contemporary EnglishSaturdaySat‧ur‧day /ˈsætədi, -deɪ $ -ər-/ ●●● S2 W2 noun [countable, uncountable] (written abbreviation Sat.) TMCthe day between Friday and Sundayon Saturday We went for a picnic on Saturday. The festivities begin Saturday. American EnglishSaturday morning/afternoon etc They arrived in Paris on Saturday evening.last Saturday I saw Sally last Saturday at the mall.this Saturday What are you doing this Saturday?next Saturday (=Saturday of next week) Ask her yourself next Saturday.a Saturday (=one of the Saturdays in the year) It was a crazy idea to go to the store on a Saturday.
Examples from the CorpusSaturday• Friday and Saturday and 2 p.m.• Last Saturday night was not, on the face of it, a roaring success.• Carrie's plane leaves Saturday.• Rowing: Thursday features semifinal action in seven divisions to determine the qualifiers for the finals on Saturday.• Iowa State lost to Utah on Saturday.• The team hit virtually every routine Saturday afternoon and set itself up for what could be a shocking team medal Monday night.• This Saturday, the Clippers play Utah in Anaheim and a crowd of more than 14,000 is expected.• It was Saturday morning in Mitford.next Saturday• Basketball practices are scheduled to begin next Saturday.• Vicky will appear in the Cinderford Carnival next Saturday.• My stepfather is coming to San Francisco next Saturday night.• They must now get a result against free scoring Glenavon next Saturday and rely on Bangor having an off day at Comrades.• The North's match with London at Otley next Saturday will decide the championship - as if anyone cares.• The Giants had until next Saturday to decide.• Would next Saturday be a good time for me to visit?