Various agencies and organizations, as well as the general public, have been invited to display on their offices and houses a purple flag with the ceremonial emblem on the celebrations from 1 January to 31 December 2015. Purple is the color of Saturday, the birthday of Her Royal Highness Princess Maha Chakri Sirindhorn. The public have also been invited to wear purple shirts, with the ceremonial emblem, as an expression of love and respect for Her Royal Highness.