What day of the week was May 17, 1980?

The day of the week May 17th, 1980 fell on was a Saturday.

General Chun Doo-hwan of South Korea seizes control of the government and declares martial law in order to suppress student demonstrations. On the eve of presidential elections the Maoist guerrilla group Shining Path attacks a polling location in the town of Chuschi, Ayacucho, starting the Internal conflict in Peru.