Timeline Sustainable Event Management 2010August 12 Sustainable Event Management: A Practical Guidegreeneventbook.com 2007September 30 BS8901First Standard BS8901: Event Sustainability Management Standard superseded by ISO 20121 in 2012 April 30 A Greener FestivalUK based event industry association, including an assessment programme and awards. Becomes ‘A Greener Future’ in 2023. agreenerfuture.org April 30 A Greener FestivalFirst Industry Assessment Programme https://www.agreenerfuture.org/ April 9 Sustainable Event Management Systems (SEMS)First Tool (retired 2013)