What to recite and when.

Nityanusandanam are to be recited on Ashvini, Bharani, Pusam, Ayilyam, Purattasi and  Utirattati. 
Amalanatipiran is to be recited on rohini nakshatra days.
Ramanuja Nurrathati to be recited on Mrugasiram, tiruvatarai, Hastam, Anusam, Puratam, Utiratam.
Perumal Tirumoli is to be recited on Punarvasu star day.
Nanmukam Thiruvantati to be recited on Makam nakshatra days.
Nacchiyar Thirumoli on the puram days.
Ciriya thirumadal on Utiram nakshatra days.
Kanninum ciruttumpu on chitirai nakshatra days.
Perialwar Thirumoli on swati nakshatra days.
Thiruviruttam on vishakam days.
Thirumalai on Kattai nakshatram days.
Upadesha ratnamala  on mula nakshatra days.
Mudal Thiruvantati on thiruvonam days.
Irandam Thiruvantati on on Avittam
Munram Thiruvantati on catyam(shatabhisha) days.
Tirumalai on revathi days.
Tirukkuruntantakam and tirunetuntantakam on Karthika days.
 a cycle of 27 days rest are holidays.