Short answer
Your written quotation confirms the delivery schedule for this womenswear suits commission, including cloth, production and destination. Barcelona's proposed visit window is MAY · JUN · SEP · OCT; dates and venues are confirmed individually.
Your written quotation confirms the schedule for cloth, production and delivery. Include any fixed event date when you enquire.
Barcelona's window
The proposed MAY · JUN · SEP · OCT visit is the planning point for Barcelona 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.