10 Dhu al-Hijjah: Day of Sacrifice; seven pebbles at Aqabah were covered in the previous lesson.
11 Dhu al-Hijjah: All three Jamarahs, totaling 21 pebbles.
12 Dhu al-Hijjah: All three again, another 21 pebbles.
13 Dhu al-Hijjah: Those staying longer repeat all three.
When Al-Quduri says al-yawm al-thānī min al-naḥr, he is counting from the Sacrifice Day, so this refers to 11 Dhu al-Hijjah.