Which of the following is not a leap $year$?

The $11^{th}$ October $1986$ was a Saturday. What was the day on $30^{th}$ January $1948$?

What was the day of the week on $13^{th}$ September $2001 \,?$

$10^{th}$ January $2105$ will be a Wednesday. What was the day on $31^{st}$ December $1704$?

The birthday of Arjun falls between $20^{th}$ and $23^{rd}$ of March. Anil remembers that the birthday of Arjun falls between $21^{st}$ and $24^{th}$ of March. So,the birthday of Arjun will be on:

January $1, 2006$ was a Sunday. What was the day of the week on January $1, 2012$?