English: “After the seven days” — What is the nature of these seven days? It teaches that the Holy One, blessed be He, altered the order of creation for them: the sun rose in the west and set in the east.
On the daf / in context: The phrase is read as a disruption of the normal seven-day cycle of creation. The luminaries reversed their course as a sign (or as part of the cosmic upheaval) preceding the Flood.
Type of Learning
Custom (reading “seven days” as a disruption of the created order of the week).
What Is Learned
During the seven days before the Flood, the normal course of the sun (and the created order) was reversed.