Arudhra Darshan, also known as Ardra festival, is an
auspicious day dedicated to Lord Shiva in Tamil Calendar and it celebrates ‘the
cosmic dance’ of Lord Shiva as Nataraja. Here is a wonderful discourse on Arudhra
Darshan by Sri Chandrasekharendra Saraswathi Swamigal (who is also known as Paramacharya,
Mahaswami or Maha Periyavar).
The discourse is in Tamil.