Habermann, praised by his contemporaries as a talented Old Testament exegete, joined
the Lutheran church in 1540, just after Martin Luther catalyzed the Protestant movement.
In 1565, Habermann published his most important work, Morning and Evening
Prayers for All Days of the Week, a prayer-book that assigned prayers for various
Christian needs to the days of the week. Within fifteen years after its publication, the
book had become widely circulated in Protestant circles, and was available in Latin,
English, and French translations. Many contemporary Protestant prayer-books still
include some of adapted versions of Habermann’s prayers.