The Key for Consulting the Tibetan Calendar came out of a course held by Chögyal Namkhai Norbu in Rome at the beginning of the 1980s as part of a seminar on Tibetan Medicine and Astrology. It aims to act as an introduction to the Tibetan astrological universe, so different from ours in its complex and fascinating richness. At the same time, it can serve as a useful instrument to guide those who understand how closely our lives are linked to the warp and weft of the movements of the universe, in the general interdependence of all phenomena. A calendar such as this one uses the knowledge and the synthesis of a thousand years of culture, even if we have forgotten it all. It is a tool which enables us to rediscover, at least in part, how we fit in with that universal energy and with that cosmos of which we are the living image and a part, a more intense and more intimate part than we are usually prepared to believe. If all days are not the same, then it is important and useful to recognise the flavour, colour and cadence with which each day manifests. What you have in your hands is a key, a precious key for the interpretation and reading of temporal and cosmic cycles, but the only person who can open and close the door of your actions is yourself.