2. (10 points) The farming proverb “counting the nines in winter” refers to the practice of dividing every nine days into segments starting from the Winter Solstice, which are sequentially called the first nine, second nine, ..., ninth nine. The Winter Solstice is the first day of the first nine. December 21, 2012, was the Winter Solstice. Therefore, February 3, 2013, is the
th nine's
th day.
Five
9
【Analysis】First, calculate the number of days from December 21, 2012, to February 3, 2013, then determine how many 9-day periods are in these days, and how many days are left over. Finally, use the remainder to determine which day of which 9-day period it is.
【Solution】Solution: From December 21, 2012, to February 3, 2013, including New Year's Day, there are $11+31+3=45$ days, $45 \div 9=5$
This indicates that exactly 5 nine-day periods have passed, and this day is the 9th day of the fifth nine-day period.
Answer: February 3, 2013, is the 9th day of the fifth nine-day period.
Therefore, the answer is: Five, 9.