Dating reverently from its era, as the Moslem from his Hegira.
I have now found Anthony Wood's authority for dating his birth in 1545.
This usually requires what is commonly known as a "dating method".
Several dating methods exist, depending on different criteria and techniques, and some very well known examples of disciplines using such techniques are, for example, history, archaeology, geology, paleontology, astronomy and even forensic science, since in the latter it is sometimes necessary to investigate the moment in the past in which the death of a cadaver occurred.
Thus, 1587 is the post quem dating of Shakespeare's play Henry V.
That means that the play was without fail written after (in Latin, post) 1587.
Like everyone else, they were descended from Noah, who built and managed the Ark, and from a people who developed an advanced civilization around the Tower of Babel.
The Aborigines of Australia lost some of their technological know-how—it can happen in a generation if parents do not pass it on to their children.
In this relative dating method, Latin terms ante quem and post quem are usually used to indicate both the oldest and the most recent possible moments when an event occurred or an artifact was left in a stratum.
The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.
Libby received the Nobel Prize in Chemistry for his work in 1960.
by Tas Walker Darwin considered the Australian Aborigines as primitive and not much evolved from the ‘anthropoid apes’.
He anticipated that the ‘wilder races’ would become extinct because survival of the fittest meant they would be superseded by the evolutionarily-advanced ‘civilised’ races.
The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen.