Sir, For Ayushya homam you need not see the day , thithi, yoga and karanam doshams.On the birth star date you have to do Ayushya homam,By doing Ayushya homam life time is incresaing. By doing navagraha homam You are getting the blessings of all devathas; and the navagrahas may not do harms.Fromyour father in law s house they will bring sugar;thamboolam ; paruppu thengai ;bakshanam;fruits;kaappu arisi 1 kilo ear ring; shirt for the child;dhoty and saree etc; In turn you are giving to them dhoty saree and money as sambandhi mariyathai.In case you have not done jatha karma;Naamakarnam ;and anna praasnam till date due to some unavoidable circumstances now before Ayushya homam you have to do first jathakarma naamakaranam and anna praasnam now For this case the following are the requirements;Turmeric powder 50 grams;kumkumam 5 grams;sandal powder 10 gram;Betel leaf 100 nos;betel nut (kalipaaku)100 grams ;vaasanai pakku pocket 50 nos;thodutha flower 2 yards;uthiri pushpam 250 grams; Haaram for the child 1;plantain fruit 25 nos;coconut 6 nos;wheat 1kilo; rice 1 kilo;plantain leaf 4 nos;Ghee 500 grams;honey 10 grams;curd 10 grams;jaggery 10 gram;rice flour 10 gram;kadugu 10 grams;viratti 10 nos;havis 250 grams;visiri 1;deepam thiri; oil;match box; aasana palagai Thaambaalam 2; mango leaf bunch 6 nos;camphor 10 gram;Thavidu 100 gram; scented stick oodhu vathi 5 grams;kinnam 6 nos;homa kundam or 10 Bricks;Pancha paathra uthirini; karpoora thattu;Saambrani 10 grams;Bell;Anugai= Permission for jatha karma; naama karnam;Anna praasnam Aayushya homam;Ganapathy poojai;Graha preethi; Kaalaatheetha graha preethi;Naandhi;japa dhakshinai; Haarathi;The child must take oil bath on the Aayushya homam day. AAyushya homam must be performed only in the child s fathers house . You must invite your father in law and family well in advance; usually jatha karma will be done on the 11th day;Dhivaspari mantras should be chanted while touching the child. Thisn manthra is praising fire (Agni) those who are doing poojas to agni devan their family will glow. THen prarthana that the child should live for 100 years.Then the chiuld will be fed with honey mixed with ghee with a silver spoon by all members of the family.Then the child will have breast milk with manthras for longevity. then homam with mixture of thavidu and kadugu to remove Baalaarishtam Then naamakaranam sangalpam Both father and mother should say the name in the right ear of the child on the 11th day.then naandhi; punyahavachanam;