Dancing Days is inspired by The Red Shoes, the original story by Hans Christian Andersen, the Powell and Pressburger film starring Moira Shearer and the album and extended music video by Kate Bush. In the poem the dancer dances for the Gods and celestial bodies who represent the days of the week.
Monday is the moon's day
Tuesday is Tiu's day, God of War (like Mars)
Wednesday is Woden's day, God of the hunt and also Mercury, God of travel
Thursday is Thor's day, God of thunder
Friday is Freya's day, Goddess of love and beauty (like Venus)
Saturday is Saturn's day, Ruler of a happy, virtuous earth
Sunday is the sun's day