The incomplete fourth cycle was supposed to start on St. John's Day , followed by a cantata for the fifth Sunday after Trinity on , at least as far as the first print of Picander's libretto of this cycle is concerned. Bach's oldest extant setting of a libretto of this cycle is however a cantata for the 21st Sunday after Trinity, , and when the cycle's librettos were printed for the second time in 1732 Picander indicated 1729 as the year of the cycle.