The annual Thimphu Tshechu, introduced in 1670 on the eighth month of the Bhutanese calendar during the reign of the fourth Desi, Tenzin Rabgye (1638-1696). The annual Thimphu Tshechu will take place from 17th to 19th September 201 to commemorate the birth anniversary of Guru Rinpoche. From the time of Gyalsey Tenzin Rabgye, based on various relevant biographies and autobiographies of saints and rulers of the past, compassionate mask dances in the form of peaceful and wrathful figures of most Ter-chams (sacred dances) have been composed and are being presented for the well being of those present on the occasion. Thimphu Tshechu is considered to be one of the auspicious festivals in the country. It is an occasion for the Bhutanese people to honor Guru Rinpoche, who brought Buddhism in Bhutan in the 8th century.