Kalachakra, meaning "Wheel of Time," is a term used in Vajrayana Buddhism, referring both to a tantric deity (ishtadevata) and to a complex system of teachings and practice. The Kalachakra Tantra is one of the major tantric texts and is particularly associated with Tibetan Buddhism. The large public initiations given by the Dalai Lama are widely known as Kalachakra ceremonies.