Worshipping the respective Gods/Goddesses on the right days has the following effects and benefits :
Tithi
God/Godess To worship
Effects
Pratipada
Agni Deva
Brings wealth.
Ditya Tithi
Ashwini Kumar & Lord Brahma
Brings success in education.
Tritya Tithi
Lord Kuber
Excessive wealth.
Chaturthi Tithi
Lord Ganesha
Destroys all hindrances in the path of success.
Panchmi Tithi
Nag pooja
Gives wealth and desired life partner.
Shashthi Tithi
Swami Kartikya
Brings fame, beauty and wealth.
Saptmi Tithi
Surya Narayana
Brings good health and wealth.
Ashtmi Tithi
Sadashiv
Gives long life, knowledge and intelligence.
Navmi Tithi
Mata Durga
Brings Victory.
Dashmi Tithi
Yama Dev
Gives cure from all diseases.
Ekadashi
Vishwa Devta
Brings land, wealth and youthfulness.
Dwadashi
Lord Vishnu
Brings success.
Tryodashi
Kama Dev
Brings beauty and desired life partner.
Chathurdashi
Lord Shiva
Brings wealth and son
Purnamashi Moon Brings fame
Amavasya Ancestors Gives protection to us and our wealth.