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 - Swayambhuva Manvadi
- Chaitra, Shukla Purnima - Swarochisha Manvadi
- Kartika, Shukla Purnima - Uttama Manvadi
- Kartika, Shukla Dwadashi - Tamasa Manvadi
- Ashadha, Shukla Dashami - Raivata Manvadi
- Ashadha, Shukla Purnima - Chakshusha Manvadi
- Jyeshtha, Shukla Purnima - Vaivaswata Manvadi
- Phalguna, Shukla Purnima - Savarni Manvadi
- Ashwina, Shukla Navami - Daksha Savarni Manvadi
- Magha, Shukla Saptami - Brahma Savarni Manvadi
- Pausha, Shukla Ekadashi - Dharma Savarni Manvadi
- Bhadrapada, Shukla Tritiya - Rudra Savarni Manvadi
- Shravana, Krishna Amavasya - Daiva Savarni Manvadi
- Shravana, Krishna Ashtami - Indra Savarni Manvadi
- Manvadi Tithi Calendar lists all Manvadi days in the year.