According to the Gregorian Calendar, it’s 12 January 2011 when this photo was taken.
However, according to the Chinese Lunar Calendar, it’s the 9th day of the 12th month.
Courtesy of Wikipedia:
The Chinese calendar is a lunisolar calendar, incorporating elements of a lunar calendar with those of a solar calendar. It is not exclusive to China, but followed by many other Asian cultures. In most of East Asia today, the Gregorian calendar is used for day-to-day activities, but the Chinese calendar is still used for marking traditional East Asian holidays such as the Chinese New Year (the Spring Festival (春節)), the Duan Wu festival, and the Mid-Autumn Festival, and in astrology, such as choosing the most auspicious date for a wedding or the opening of a building. Because each month follows one cycle of the moon, it is also used to determine the phases of the moon.