Given that 1st January 2006 was a Sunday, we need to find the day on 2nd January 2010.
The total time span needs to be calculated from 1st January 2006 to 2nd January 2010.
Counting the number of days in each year:
Year 2006: 365 days (not a leap year)
Year 2007: 365 days (not a leap year)
Year 2008: 366 days (leap year, divisible by 4)
Year 2009: 365 days (not a leap year)
From 1st January 2010 to 2nd January 2010: 1 day
Total days =365+365+366+365+1
Total days =1462
To find the day of the week, we calculate the number of complete weeks and remaining days:
1462÷7=208 remainder 6
This means 1462=7×208+6
The remainder is 6 days.
Starting from Sunday (1st January 2006) and moving forward 6 days:
Sunday → Monday → Tuesday → Wednesday → Thursday → Friday → Saturday
Therefore, 2nd January 2010 was a Saturday.
The correct answer is Option 1: Saturday.