Hello!
The correct answer is January 2 is a holiday of the month.
Why?
Let's check the other options first
A - The festive week: Incorrect. Since we are talking a single day referred to an event such Country Independence, this option is incorrect.
B - The New Year: Incorrect. New year usually refers to the first day of the year which is January 1.
C - The eve of the year: Incorrect. The eve of the year refers to the last day of the year, which is December 31
D - Holiday: Correct. Holiday refers to an official day, usually related to special historical events. For this case, we have that January 2 is the celebration of Independence of a country.
Have a nice day!