By Matt Hardy The traditional T20 Vitality Blast weekend is soon upon us, where the best white-ball domestic sides in England compete to be crowned champions. But when is it, where will it be held, who won it last year and how much are tickets? Well, City A.M. have you sorted. When is T20 Finals Day?T20 Finals Day will take place on Saturday 14 September, beginning at 11 o’clock. Why the early start, you may ask? Because unlike the group stages or the quarter-finals of the Vitality Blast, you get more than one match. You even get more matches for the ticket price than you do at The Hundred – w…