Warning: heavy spoilers under spoiler text.
Twice dawns the day when his blood is shed.
Once for mourning, once for birth.
Red on black, the Dragon's blood stains the rock of Shayol Ghul.
In the Pit of Doom shall his blood free men from the Shadow.
The Great Hunt Chapter 26: Discord
The US cover of the book has:
Showing an Eclipse which I assume fulfils the "Twice dawns the day.." stanza
However, during the Last Battle,
there is heavy cloud cover and a time dilation effect occurring outwards from Shayol Ghul.
Was this event even visible across the land and did people know what it meant?
Did it occur (from everyone elses perspective) the day Rand and his followers went into Shayol Ghul, or the day they came out?
I can't recall any reference to the eclipse in the text (I'm sure there was, I must have just missed it and can't seem to drop on it).
Does "Once for mourning, once for birth" refer to
Rand's "death" and new life in Moridin's body, or something else I missed.
The last two lines of the prophecy seem relatively clear.