1 Kalpa, the unit of time in Vedic astrology, is divided into 14 Manvantara. One Kalpa equals to 4.32 billion solar years. One Tithi is fixed for each Manvantara and known as Manvadi Tithi(s). Manvadi Tithi(s) are considered significant for doing Shradh rituals for departed souls.
Following Tithi(s) are marked as Manvadi in Hindu Calendar. Each Manvadi Tithi has been named based on the ruling saint of Manvantara.
- Chaitra, Shukla Tritiya - Uttama Manvadi
- Jyeshtha, Shukla Purnima - Bhautya Manvadi
- Ashadha, Shukla Dashami - Chakshusha Manvadi
- Ashadha, Shukla Purnima - Brahma Savarni Manvadi
- Shravana, Krishna Ashtami - Surya Savarni Manvadi
- Bhadrapada, Shukla Tritiya - Tamasa Manvadi
- Ashwina, Shukla Navami - Swayambhuva Manvadi
- Kartika, Shukla Dwadashi - Svarochisha Manvadi
- Kartika, Shukla Purnima - Dharma Savarni Manvadi
- Pausha, Shukla Ekadashi - Raivata Manvadi
- Magha, Shukla Saptami - Vaivasvata Manvadi
- Phalguna, Krishna Amavasya - Daksha Savarni Manvadi
- Phalguna, Shukla Purnima - Rudra Savarni Manvadi
- Phalguna, Amavasya - Rauchya Manvadi
- Manvadi Tithi Calendar lists all Manvadi days in the year.