DOWNLOAD THE COS APP at www.atlas-live.com/cos. Each year over 350 members open their studios to the public over four weekends in July. Studios are open between 11am-6pm each Saturday and Sunday. Dates for 2018 will be: 7-8, 14-15, 21-22, 28-29 July. Numbers attached to each entry below refer to those used in the printed Open Studios Guide Guide. The Guide will be widely available in shops, galleries, libraries and tourist information centres from early June.