Despite the chocolate bunnies, eggs and toy chickens in the shops along with the coaxing to buy and celebrate Easter at this time in Australia, it is not Spring: Earth here does not seem to co-operate with the Consumer Faith, built as it is around the Northern Hemisphere and dominant Christian calendar. In the Southern Hemisphere it is Autumn, the dark part of the day is lengthening.

On March 20^th at 4:30 UT Earth will be perfectly poised in balance for a moment: it is a global moment of Equinox – one of the annual two. Humans have celebrated it for millennia, perhaps for many tens of thousands of years, in ways appropriate to various regions, in both the South and the North of the Planet. The light and dark parts of the day in the South and in the North of our planet, are of equal length at…