2026 Arthouse Unlimited Slim Calendar from Portico Designs Ltd. Following on from the successful launch for 2025, we are excited to continue our collaboration with this inspiring organisation, the artists work alongside instructions to create stunning artworks which are developed into high quality, designer products. Month to View Layout. Each month includes notes section and next month planner. Includes 2026 and 2027 planners plus list of holidays and important dates.