Days of Atonement

From Memory Alpha, the free Star Trek reference

The Days of Atonement are a period celebrated in the Bajoran religion.

In 2373, Vedek Latha Mabrin and other Bajoran monks assembled at the Calash Monastery to prepare for the Days of Atonement by prayers and meditation, but Latha was soon killed by a a hunter probe. (DS9: "The Darkness and the Light")