Tolkien's final First Age timeline

[Huinesoron]

Taking these in reverse order:

864 or 863 - I take the point that XVII.3(7) uses 2016, not 864/144, as the date of the Finding. That means Tolkien's error in XIII.1 was the reverse of what I thought it was, and I need to adjust the dates as Arvegil suggested. (Note: XVII.3(7) also dates the March to 2232, which is later and more precise than the dating in XIII.3.) I suspect this throws off the 3100 years from the arrival in Aman to the end of the Age; I'll have to run the calculations.

Aging - XVIII is later than XVII.3(7), so I have to use 72 years as adulthood for named Elves. All this means is that in the beginning, the Quendi aged faster - which is suggested in multiple generational schemes. I have no problem with that, and it's part of why I didn't list every generation-start date in the first place.

Celeborn - the simplest solution here is to leave Celeborn's birth-date in place, but to remove his father's name and reference the later source as to why. There's nothing in the late sources saying he was born in Aman, right? He could still be born on the March; we already saw that there was time for him to be a grandson of Elmo, and Olwe is older. (The rest of Elmo's descendents have no birth-years, so are out of scope anyway.)

Celebrimbor - At the risk of being facetious, there's no reason he couldn't be a Teler of Alqualonde and Curufin's son. His birth is long before Feanor's exile, so he could have stayed with a Telerin mother; and PoME notes that Curufin's wife was of wholly different temperament to him. To go full synthesis on the tales, he could have sailed with Celeborn and Galadriel, reconciled with his father and uncles, lived in Nargothrond with them, rejected them, travelled to the Nirnaeth with Gwindor, and wound up retreating to Gondolin with Turgon. –but all that matters is that there's no source contradicting the claim that he was the son of Curufin.

Beleriand - There is no natural divide in the GA timeline (unlike AAm, which splits very nicely into early history / late history blocks): it's all supposed to be early. So other than Elwe's awakening (and Luthien), it all has to be anchored on a single date. There is no obvious right answer; I'll need to work up a table of all the options, once I've got the rest of the numbers adjusted.

Luthien - Given that Luthien's birthdate is fixed solely on the basis of "one third of Melkor's imprisonment", that will need to be maintained. There is no other basis for including her at all.

The Fall of Utumno - Did Utumno fall at the beginning or end of the Great March? The only case for "beginning" is the VI.B claim that the Arising and Fall of Men happened during the Captivity, and that only indicates "beginning" if you take the relative dates of the Awakening/Finding/Fall, rather than the absolute date of 10 VY after the Finding. With several later sources stating or implying that the Fall of Men was solely at Melkor's hands, we can ignore that tenuous argument entirely, and go with the plain text that says Utumno fell after the March was over.

I'll have to work the numbers on most of these points, but other than Beleriand I think this is a solid plan.

hS