What day of the week was December 12, 1979?

The day of the week December 12th, 1979 fell on was a Wednesday.

There were 13 days until Christmas.

Coup d'état of December Twelfth: South Korean Army Major General Chun Doo-hwan orders the arrest of Army Chief of Staff General Jeong Seung-hwa without authorization from President Choi Kyu-ha the alleging involvement in the assassination of ex-President Park Chung Hee. President of Pakistan Zia-ul-Haq confers Nishan-e-Imtiaz on Nobel laureate Dr Abdus Salam. The unrecognised state of Zimbabwe Rhodesia returns to British control and resumes using the name Southern Rhodesia.