Sathya Sai devotees all over the world are observing Aradhana Mahotsavam by remembering and practicing the teachings of Lord Sathya Sai, who left His physical form on 24th April, five years ago. We are undertaking 30 days of intense spiritual practice to express our gratitude for the unconditional love showered on us by Bhagawan. Large-scale programmes are being organised in many countries at this time, to unite the worldwide Sai family, and pay homage to Him.
Source: http://sathyasai.org/video/dr-narendranath-reddy-aradhana-mahotsavam-2016