Worldwide Cyanotype Day Event Details This event is running from 23 September 2017 until 28 September 2024. It is next occurring on 28/09/2024 11:00 am Categories: Cyanotype Tags: CalendarEvent, WCD Upcoming Dates: 28/09/2024 11:00 am – 05/10/2024 4:00 pm Join us to celebrate the cyanotype process. Last Saturday in September each year.