Kalachakra Mandala Thangka art is hand painted by the artisan of Kathmandu valley. Kalchakra represents time and everything is under the influence of time. The Kalachakra deals with two chapters: physical world and inner human gestation of birth and expression in physical world. The third chapter deals with the preparation for the meditation practices of the system. In Tibet, the Kālachakra astrological system is one of the main building blocks in the composition of Tibetan astrological calendars.