In Jainism, “pakkhi / pahki” comes on the 15th tithi of each paksha – that is:

• Sud Pakkhi → on Poonam (full‑moon day)
• Vad Pakkhi → on Amavasya (no‑moon day)

For March 2026 (current year), according to the Jain (lunar) calendar:

• Sud Pakkhi – on 3 March 2026 (Falgun Sud Poonam) ( calendargujarati.com)
• Vad Pakkhi – on 19 March 2026 (Falgun Vad Amavasya) ( calendargujarati.com)

These dates can shift every year and can also vary slightly by country/city, so for any other year or location, please check your local Jain panchang / tithi calendar.