In Jainism, the two Oli are called:

1. Chaitra Oli (Chaitri Oli) – in the month of Chaitra (around March–April).
2. Aso / Ashwin Oli (Asoj Oli) – in the month of Aso/Ashwin (around September–October).

Both are Navpad Ayambil Oli: 9 days each, observed twice a year. You can read more here