The Mayan date November 15, 2720 BC could possibly have corresponded to the position of Gb1-10 and to the time when the Sun reached the end of the Eagle constellation.

In rongorongo times this Tail of the Eagle (evidently from τ to ρ Aquilae) was beginning with the Sun in January 18 (383 = 18 + 365):

In the C text there is a hoea resembling that in Ga2-26 and both are possibly representing the opposite of the final phase of life, viz. birth (hanau):

Cb4-19	Cb4-20 (91)	Cb4-21 (484)	Cb4-22	Cb4-23

And in E there is a hoea in Gb6-3:

24th and last period:
Eb5-29	Eb5-30	Eb5-31 (180)	Eb5-32	Eb5-33	Eb5-34	Eb5-35
Eb6-1	Eb6-2	Eb6-3 (187)	Eb6-4	Eb6-5	Eb6-6
Eb6-7	Eb6-8	Eb6-9 (193)	Eb6-10	Eb6-11	Eb6-12	Eb6-13
Eb6-14	Eb6-15 (525)	Eb6-16	Eb6-17	Eb6-18	Eb6-19

With a niu (young coco-nut palm tree) arriving 2 days later we can guess this was a place where the Old One was rejuvenating himself.

niu	Eb6-5	Ga2-29

There are 6 new 'feathers' in the branch growing up in front.

... In late September or early October 130, Hadrian and his entourage, among them Antinous, assembled at Heliopolis to set sail upstream as part of a flotilla along the River Nile. The retinue included officials, the Prefect, army and naval commanders, as well as literary and scholarly figures. Possibly also joining them was Lucius Ceionius Commodus, a young aristocrat whom Antinous might have deemed a rival to Hadrian's affections. On their journey up the Nile, they stopped at Hermopolis Magna, the primary shrine to the god Thoth.

It was shortly after this, in October [in the year A.D.] 130 - around the time of the festival of Osiris - that Antinous fell into the river and died, probably from drowning. Hadrian publicly announced his death, with gossip soon spreading throughout the Empire that Antinous had been intentionally killed. The nature of Antinous's death remains a mystery to this day, and it is possible that Hadrian himself never knew; however, various hypotheses have been put forward. One possibility is that he was murdered by a conspiracy at court. However, Lambert asserted that this was unlikely because it lacked any supporting historical evidence, and because Antinous himself seemingly exerted little influence over Hadrian, thus meaning that an assassination served little purpose. Another suggestion is that Antinous had died during a voluntary castration as part of an attempt to retain his youth and thus his sexual appeal to Hadrian. However, this is improbable because Hadrian deemed both castration and circumcision to be abominations and as Antinous was aged between 18 and 20 at the time of death, any such operation would have been ineffective. A third possibility is that the death was accidental, perhaps if Antinous was intoxicated. However, in the surviving evidence Hadrian does not describe the death as being an accident; Lambert thought that this was suspicious. Another possibility is that Antinous represented a voluntary human sacrifice. Our earliest surviving evidence for this comes from the writings of Dio Cassius, 80 years after the event, although it would later be repeated in many subsequent sources. In the second century Roman Empire, a belief that the death of one could rejuvenate the health of another was widespread, and Hadrian had been ill for many years; in this scenario, Antinous could have sacrificed himself in the belief that Hadrian would have recovered. Alternately, in Egyptian tradition it was held that sacrifices of boys to the Nile, particularly at the time of the October Osiris festival, would ensure that the River would flood to its full capacity and thus fertilize the valley; this was made all the more urgent as the Nile's floods had been insufficient for full agricultural production in both 129 and 130. In this situation, Hadrian might not have revealed the cause of Antinous's death because he did not wish to appear either physically or politically weak. Conversely, opposing this possibility is the fact that Hadrian disliked human sacrifice and had strengthened laws against it in the Empire ...

And with Eb6-3 as glyph 187 it is easy to imagine the beginning of side b coincided with January 1, because we have found day 187 (July 6) to be of central importance. This was at Ga8-22 where there was an inversion:

NOVEMBER 1	2 (306)	3 (*227)	4	5
Ga8-22	Ga8-23	Ga8-24 (227)	Ga8-25	Ga8-26
19h (289.2) λ Aquilae (Ant.) (289.1), γ Cor. Austr (289.3), τ Sagittarii (289.4), ι Lyrae (289.5), δ Cor. Austr. (289.8)	Al Baldah-19 AL BALDAH = π Sagittarii, ALPHEKKA MERIDIANA = α Cor. Austr. (290.1), β Cor. Austr. (290.2)	ALADFAR = η Lyrae (291.1), NODUS II = δ Draconis (291.5), ψ Sagittarii (291.6), τ Draconis (291.7), θ Lyrae (291.8)	ω Aquilae (292.1), ρ Sagittarii (292.6), υ Sagittarii (292.7)	π Draconis, ARKAB PRIOR = β¹ Sagittarii (293.0), ARKAB POSTERIOR = β² Sagittarii, ALRAMI = α Sagittarii (293.2), χ Sagittarii (293.6)
January 4	5 (*290)	6	7 (372)	8
°December 31	°January 1	2 (*287)	3 (368)	4
'December 8	9	10 (*264)	11 (345)	12
"November 24	25 (329)	26 (*250)	27	28
NAKSHATRA DATES:
MAY 3 (123)	4	5 (*45)	6 (*411)	7 (492)
WEZEN (Weight) = δ Canis Majoris (107.1), τ Gemini (107.7), δ Monocerotis (107.9)	no star listed (108)	λ Gemini (109.4), WASAT (Middle) = δ Gemini (109.8)	no star listed (110)	ALUDRA (Virgin) = η Canis Majoris (111.1), PROPUS = ι Gemini (111.4),  GOMEISA = β Canis Minoris (111.6)
July 6 (*107)	7	8	9 (190)	10
°July 2	3 (184)	4	5	6 (*107)
'June 9	10 (161)	11	12	13 (*84)
"May 26	27	28 (148)	29	30 (*70)
Ga2-13	Ga2-14	Ga2-15 (45)	Ga2-16	Ga2-17

Probably 187 was used also for the heliacal days to July 6 at Rogo on side b of the tablet:

APRIL 27 (*37)

Gb6-20 (402 = 229 + 173)

SIRIUS = α Canis Majoris (101.2), ψ5 Aurigae (101.4), ν Gemini (101.6), ψ6 Aurigae (101.7)

June 30 (181)

APRIL 28 (2 * 59)	29 (484)	30 (*40)	MAY 1 (11 * 11)
Gb6-21 (403)	Gb6-22 (175)	Gb6-23 (136 + 40)	Gb6-24 (3 * 59)
τ PUPPIS (102.2), ψ7 Aurigae (102.4)	Mash-mashu-sha-Risū-9 (Twins of the Shepherd ?) θ Gemini (103.0), ψ8 Aurigae (103.2), ALHENA = γ Gemini (103.8), ψ9 Aurigae (103.9)	ADARA (Virgins) = ε Canis Majoris (104.8)	ω Gemini (105.4), ALZIRR = ξ Gemini (105.7), MULIPHEIN = γ Canis Majoris (105.8), MEKBUDA = ζ Gemini (105
July 1	2	3 (*104)	4 (185)

MAY 2 (*42)	3 (123)	4	5 (490)
Gb6-25 (229 + 178)	Gb6-26 (408)	Gb6-27 (180)	Gb6-28 (136 + 45)
7h (106.5) no star listed (106)	WEZEN (Weight) = δ Canis Majoris (107.1), τ Gemini (107.7), δ Monocerotis (107.9)	no star listed (108)	λ Gemini (109.4), WASAT (Middle) = δ Gemini (109.8)
July 5 (186)	6 (*107)	7	8

... The month, which takes its name from Juppiter the oak-god, begins on June 10th and ends of July 7th. Midway comes St. John's Day, June 24th, the day on which the oak-king was sacrificially burned alive. The Celtic year was divided into two halves with the second half beginning in July, apparently after a seven-day wake, or funeral feast, in the oak-king's honour ...

Furthermore, we have identified the distance 84 (= 420 / 5) days from hoea to the place where the Ruler might have gone away for a while.

18 * 29½ = 531 as in Eb5-31.

C and K texts:
MAY 13 (*53)	83	AUGUST 5 (*137)
Cb4-20 (483, 300)		*Ca14-21 (384)
Ka3-14 ('March 13')		*Kb2-6 (73 + 84 = 314 / 2)
July 16 (197)		October 8 (281)
AZMIDISKE (*117) Altair (*300)		(*201) Adhil (*384)
NOVEMBER 12 (316)		FEBRUARY 4 (400)