 Daniel is told the vision will be fulfilled in 2,300 evenings and mornings, when the sanctuary will be cleansed.The angel Gabriel appears and tells Daniel that this is a vision about the time of the end.The Book of Daniel originated as a collection of folktales among the Jewish community in Babylon and Mesopotamia in the Persian and early Hellenistic periods (5th to 3rd centuries BCE), and was later expanded by the visions of chapters 7–12 in the Maccabean era (mid-2nd century).