The Madras High Court on Thursday directed the Tamil Nadu government to allow 20,000 devotees on November 19 and 20 at Tiruvannamalai in the state for the annual holy Karthigai deepam festival and the 'girivalam' (circumbulation). The Karthigai deepam festival at the Arulmigu Arunachaleshwarar Temple in Tiruvannamalai is scheduled to be held on Friday.