Short answer
Your written quotation confirms the delivery schedule for this black tie & tuxedos commission, including cloth, production and destination. Vienna's proposed visit window is SEP · OCT; dates and venues are confirmed individually.
For a fixed event date, share it when you enquire. Your written quotation confirms the schedule for cloth, production and delivery before you order.
Vienna's window
The proposed SEP · OCT visit is the planning point for Vienna commissions. Dates, venues and available appointments are confirmed individually in writing as the month approaches.
The itinerary is a proposal: months are planned, dates and venues confirmed individually. Final quotations are confirmed in writing before you commit.