7500 B.C.E.

* Metal-working of naturally occurring nuggets of gold and silver in
  Anatolian mountains 
* Agriculture & domestication of goats & sheep in Arachosia at Mehrgarh
* Sialk civilisation begins in the Sialk Hills
* Vega used as an orientation point for some of Dendera's temples
  [J.N. Lockyer]
  6400 B.C.E.

* Age of Cancer ends, Age of Gemini begins
* "0th" lunar station created - beginning circa gamma Geminorum and ending
  circa Sirius (father of Soma's 27 wives); to be placed between Gemini &
  Cancer in Dendera's zodiac
* Vernal equinox at the same right ascension as Sirius
* Celestial North makes closest approach to theta Draconis

* First year 'Anno Mundi' begins on Saturday the 1st of September 5509, 
  marking the epoch of the Byzantine Era (to be used until A.M. 7208, when
  Russia will adopt the Comaius Era for the Julian calendar)
* Founding of Egypt said to begin during the Old-Style year as of the
  epoch of the Alexandrian Era--Sunday the 25th of March 5492

  5300 B.C.E.
* vernal equinox halfway into Gemini after passing by gam Geminorum
* Sanctuary of Ptah at Memphis built to point to the setting of Capella   
  [J.N. Lockyer]
* Celestial North makes closest approach to iota Draconis

* Muenes inherits a unified Egypt from Horus, founds first dynasty (4777)
  [Herodotus; W. Jones; (Petrie)]
* Julian Day No 0 begins at midnight Fiji Time  Tues. 2 Jan. 4712 O.S.
* Elamite civilisation begins at Susa
* Civilisation evolves with Eridu as our first city-state [(~4700)
   Sky & Telescope, 129:3, p.39]
* A decimal counting system is in use in Egypt
* Egypt said to establish its civil calendar fixed at 365 days p.a. as of
  the epoch of the ensuing Sothic cycle (4400)
  [E.G. Richards, Mapping Time. p.158; Breasted (4242)]
* Sumerians, concluding economic cycles of hardship would make debts
  impossible to pay back, institute debt Jubilees (4272)
* Age of Gemini ends, Age of Taurus begins, marking the epoch of the
  Sumerian calendar  
  4200 B.C.E.