It is thought that Syakkonichi, with Shakuzetsunichi (the day ruled by Syakuzetsujin [the guardian god of the west gate of the capital of Taisaijin]) had some influence on the present folk belief in Rokuyo (literally, "six days," the traditional six days in Japanese calendar).
現在の民間での六曜信仰に、赤舌日とともになんらかの形で影響したと考えられている。