As for the Day of ‘Arafah: it is the day in which the believers came to know one another, wherein the Meaning manifested to them in His celestial form.
As for the Day of Tarwiya: it is the day in which He appeared to them, then became hidden from them, then He manifested to them on the Day of ‘Arafah; thus the believers recognized Him, and He made known to them their stations and God’s favor upon them.
As for the Four White Days: they are Hamza, Ja’far, ‘Abdullah, and al-Harith.
And the Great Day: Salsal. “The Day when mankind will stand before the Lord of the worlds” 1
The Commander of the Bees, and "mankind" are the possessors of ranks and stations, and the "Lord of the Worlds": the High, the Great. “The Day the Caller calls to a terrible thing” 2
the Sustainer. “A distressful day” 3