Jain community nationwide

Reuses the same masa/tithi grid rather than a separate calculation. Mahavir Jayanti (Chaitra Shukla Trayodashi) is a computed festival, and Diwali is additionally observed as Mahavira's nirvana on the same night. Paryushan/Das Lakshana is deliberately not listed here yet — its tithi range differs between the Digambara and Shvetambar traditions and needs a sourced rule for each before it is dated rather than approximated.