What day of the week was January 18, 1977?

The day of the week January 18th, 1977 fell on was a Tuesday.

Scientists identify a previously unknown bacterium as the cause of the mysterious Legionnaires' disease. Australia's worst rail disaster occurs at Granville the Sydney killing 83. SFR Yugoslavia's Prime minister the Džemal Bijedić, his wife and 6 others are killed in a plane crash in Bosnia and Herzegovina.