Table:
text: 1963 Formula One season
Non-Championship race results
Non-Championship race results
_ Race_Name Circuit Date_ Winning_driver Constructor_ Report
8 XV Gran Premio di Roma Vallelunga 19 May Bob Anderson Lola - Climax Report
9 III Solituderennen Solitudering 28 July Jack Brabham Brabham - Climax Report
10 XII Kanonloppet Karlskoga 11 August Jim Clark Lotus - Climax Report
11 III Mediterranean Grand Prix Enna Pergusa 18 August John Surtees Ferrari Report
12 I Austrian Grand Prix Zeltweg 1 September Jack Brabham Brabham - Climax Report
13 X International Gold Cup Oulton Park 21 September Jim Clark Lotus - Climax Report

Question: What date is listed at number 13 in the non-championship race results of the 1963 Formula One season?

Question: What is the date of a loneliness track in the non-championship race results in the 1963 Formula 1 season?