... Midsummer is the flowering season of the oak, which is the tree of endurance and triumph, and like the ash is said to 'court the lightning flash'. Its roots are believed to extend as deep underground as its branches rise in the air - Virgil mentions this - which makes it emblematic of a god whose law runs both in Heaven and in the Underworld ... 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 ...

... The difference between 365¼ and 365.2425 is 3 / 400 (= 0.0075) of a day and according to the Julian calendar spring equinox (north of the equator) was therefore gradually gliding backwards with about 1 day in 1 / 0.0075 = 133 years ...

1842 (my assumed epoch for rongorongo) - 1582 (birth of the Gregorian calendar) = 260 and 260 / 133 = ca 2 days. I.e., "August 1 (213) could in my assumed Julian calendar of the Explorers have been Hora Iti 13 (225). 15 * 15 = 225 = 213 + 10 (lost days in 1582) + 2.

GREDI (α Capricorni)

ι Phoenicis (357.3), ι Piscium (357.4), λ Andromedae (357.9)

κ Piscium (354.2), θ Piscium (354.4), υ Pegasi (354.9)

... τ, 4.5, with υ, was Al Sufi's Sa'd al Na'amah, which Knobel thinks should be Al Na'āim, the Cross-bars over a well; but they also were known as Al Karab, the Bucket-rope. The usual titles for τ - Markab and Sagma or Salma - are from Bayer, but the last two should be Salm, a Leathern Bucket ...

... With α Andromedae [Sirrah → Navel] and γ Pegasi [Kerb], as the Three Guides, it [Caph → Phoenician Kaph, Hand] marks the equinoctial colure, itself exceedingly close to that great circle; and, being located on the same side of the pole as is Polaris, it always affords an approximate indication of the latter's position with respect to that point. This same location, 32º from the pole, and very near to the prime meridian, has rendered it useful for marking sidereal time. When above Polaris and nearest the zenith the astronomical day begins at 0 hours, 0 minutes, and 0 seconds; when due west the sidereal time is 6 hours; when south and nearest the horizon, 12 hours, and when east, 18 hours; this celestial clockhand then moving on the heavenly dial contrary to the motion of the hands of our terrestrial clocks, and at but one half the speed ...