January 1, 2000 was a Saturday.
To find the day of the week for January 1, 2001, we need to determine how many days passed between these two dates.
The year 2000 is a leap year because it is divisible by 400.
A leap year has 366 days.
Therefore, from January 1, 2000 to January 1, 2001, there are 366 days.
To find the day of the week, we calculate how many complete weeks are in 366 days:
366=52×7+2
366=364+2
This means 366 days = 52 complete weeks + 2 extra days.
Starting from Saturday and adding 2 days:
Saturday + 1 day = Sunday
Saturday + 2 days = Monday
Therefore, January 1, 2001 was a Monday.
The answer is Option 1: Monday.