Tishri

As the last of the group comes Shamash himself, to whom the seventh month, Tishri (or Tashritum), is sacred.

It is, however, to them always the first day of the month Tishri, and the first day of their new year.

On the first of Tishri Adam was created; from his existence we count our years, that is the sixth day of the creation.

On the first of Tishri the universe was created, and during the Passover was Isaac born.