January 28, 1986 was a Tuesday.
Monday
February 29th, 1985 was actually a leap year. So, this day of the week did not occur.
A week is larger than a day because a day has 24 hours but a week has 168.
A week is 7 days long, there is no 8th day in a week.
If the first and last day of a month fall on the same day of the week, that month has exactly 29 days, meaning it is February in a leap year. In other months, the first and last days can only align on the same day of the week if the month has either 28 or 30 days. However, only February with 29 days allows this alignment to occur.
The Challenger Accident occured on Tuesday, January 28th, 1986.
The shuttle challenger, disintegrated after launch, killing all seven astronauts on board on Tuesday, January, 28, 1986.
The space shuttle Challenger exploded on January 28, 1986, which was a Tuesday.
September 11th can be on any day of the week
On Sabbaths and Jewish holidays. (The holidays can occur on any day of the week.)
Tuesday- D-Day occurred on a Tuesday.
The time of day or day of week does not seem to matter.
Thursday
Tuesday
Saturday.
Monday
It was a Thursday.