Rokuyo refers to one of rekichu (various information recorded in the almanac) and has the six kinds such as sakigachi (The day on which bold actions are supposed to turn out well), tomobiki (The day currently believed to pull a friend by superstition), sakimake (The day on which it is supposed to be better to avoid disputes and hurried actions), butsumetsu (Buddha's death or unlucky day), taian (The most auspicious day in the six-day Buddhist calendar) and shakko (The day of great misfortune).
六曜（ろくよう）は、暦注の一つで、先勝・友引・先負・仏滅・大安・赤口の6種をいう。