Second day of the festival of Holi is associated with the immortal love of Radha and Lord Krishna. The young Krishna complained to his mother Yashoda about why Radha was so fair and he was so dark. Yashoda advised him to apply color on Radha's face and see how her complexion would change. In addition, Lord Krishna is believed to have popularized the festival by playing pranks on the gopis/ cowgirls. Holi is celebrated for 16 days in Vrindavan and Mathura due to the fact that these are the two cities with which Lord Krishna shares his deep affection.