16,4 billion years ago = cellullare cycle, creation of living cell
820 million years ago = organisation of cells
41 million years ago = animal cycle -apes
2 million years ago = tribal cycle-humanoids
102.000 years ago = cultural cycle - language
5125 years ago = national cycle-written language
256 years ago = planetary cycle -technology
12,8 years ago = galactic cycle
9 months = Universal cycle

The cycles are 20x smaller each time, and show us an acceleration in the evolution of our consciousness. The whole Calendar is not a clockwork, but measures the evolution flow since creation.