Without looking at the little devotional booklet, the image of Jesus, Divine Mercy is to be venerated on Mercy Sunday.
Elsewhere, Jesus asks us to remember His Passion at the 3 o’clock hour every day whether it means stepping in to the chapel to briefly visit the Blessed Sacrament or, if duties do not permit it, reflect or meditate on this moment of mercy.
In either case, you would have to loosely define worship to accommodate these two situations.
I hope this helps.
Joe