Tshechu (Dzongkha: ཚེས་བཅུ།, literally "day ten") are annual religious Bhutanese festivals held in each district or dzongkhag of Bhutan on the tenth day of a month of the lunar Tibetan calendar. The month depends on the place. Tshechus are religious festivals of the Drukpa Lineage of the Kagyu school of Tibetan Buddhism.
Tshechus are large social gatherings, which perform the function of social bonding among people of remote and spread-out villages. Large markets also congregate at the fair locations, leading to brisk commerce. The Thimphu tshechu and tha Paro tshechu are among the biggest of the tshechus in terms of participation and audience.
The focal point of the tshechus are Cham dances. These costumed, masked dances typically are moral vignettes, or based on incidents from the life of the 9th century Nyingma teacher Padmasambhava and other saints.
Most tshechus also feature the unfurling of a thongdrel - a large appliqué thangka typically depicting a seated Padmasambhava surrounded by holy beings, the mere viewing of which is said to cleanse the viewer of sin. The thongdrel is raised before dawn and rolled down by morning.
Because tshechus depend on the availability of masked dancers, registered dancers are subject to fine if they refuse to perform during festivals.
Padmasambhava, the great scholar, visited Tibet and Bhutan in the 8th century and 9th century. He used to convert opponents of Buddhism by performing rites, reciting mantras and finally performing a dance of subjugation to conquer local spirits and gods. He visited Bhutan to aid the dying king Sindhu Raja. Padmasambhava performed a series of such dances in the Bumthang Valley to restore the health of the king. The grateful king helped spread Buddhism in Bhutan. Padmasambhava organized the first tshechu in Bumthang, where the eight manifestations of Padmasambhava were presented through eight forms of dances. These became the Cham dances depicting the glory of Padmasambhava.