Regulating Customs is the twelfth issue of the ‘The Ritual Year' series. The volume explores a range of regulatory forces that preserve, replace and revive, shape, and influence the practice and structure of calendar customs today. The eleven research articles by scholars from ten countries are based on first-hand field research and examine the age-old tensions between stasis and innovation, stability and change, and the creativity that is on display in even the most ’traditional’ of practices.