"Sunday Syndrome" is a collection of soundscapes done in Spring and Summer of 2015. The term "syndrome" is used to describe a combination of emotions, understandings, etc. that may be associated with, say, a specific day. "Earth Day Syndrome", for example, conveys a sense of darkness associated with global warming, deforestation, extinctions, etc. The album title conveys a sense of mellowness associated with a relaxing summer Sunday, as do many of these soundscapes.