Sandhi Puja is a very significant ritual during Navratri Puja. It is performed at the point when Ashtami Tithi ends and Navami Tithi begins. This is believed to be the moment when Devi Chamunda appeared to kill the demons Chanda and Munda.
Sandhi Puja is dominant for two Ghatis or approximately lasts for 48 minutes. It is possible that Sandhi Puja Muhurta occurs at any time of the day and Sandhi Puja should be done during that time only.
You might also refer the complete Shardiya Navratri Calendar and Durga Puja Calendar.
Navratri Day 1: Thursday 3rd October 2024
Pratipada
Ghatasthapana
Shailputri Puja
Navratri color of the day – Yellow
Navratri Day 2: Friday 4th October 2024
Dwitiya
Chandra Darshan
Brahmacharini Puja
Navratri color of the day – Green
Navratri Day 3: Saturday 5th October 2024
Tritiya
Sindoor Tritiya
Chandraghanta Puja
Navratri color of the day – Grey
Navratri Day 4: Sunday 6th October 2024
Tritiya
Varad Vinayaka Chauth
Navratri color of the day – Orange
Navratri Day 5: Monday 7th October 2024
Chaturthi
Kushmanda Puja
Upang Lalita Vrat
Navratri color of the day – White
Navratri Day 6: Tuesday 8th October 2024
Panchami
Skandamata Puja
Navratri color of the day – Red
Navratri Day 7: Wednesday 9th October 2024
shashthi
Saraswati Awahan
Katyayani Puja
Navratri color of the day – Royal Blue
Navratri Day 8: Thursday 10th October 2024
Saptami
Saraswati Puja
Kalaratri Puja
Navratri color of the day – Pink
Navratri Day 9: Friday 11th October 2024
shtami
Durga Ashtami
Mahagauri Puja
Sandhi Puja, Maha Navami
Navratri color of the day – Purple
Navratri Day 10: Saturday 12th October 2024
Navami
Ayudha Puja, Navami Homa
Navratri Parana
Durga Visarjan, Vijayadashami