Here are the common fasting (upvaas) types observed during Paryushan, along with brief meanings. Note the naming and exact practices can vary between Digambar and Shwetambar communities.

• Upvaas (Full day fast): No solid food; often drinking boiled water is allowed. Fasting is kept from sunrise to the next sunrise. Digambar/Shwetambar communities both observe this, with local timings varying. You may break the fast after sunrise and before sunset.

• Ekasana: One meal per day (usually before sunset), followed by boiled water afterwards if allowed by local custom. This is a mild but formal form of daily fasting during Paryushan.

• Biyāsana (Biyasana): Two meals per day, with strict discipline about what is eaten; often no spicy or heavy items. This is a more controlled fasting pattern.

• Ayambil: One bland, minimal meal per day (no spices, no dairy, no fruits, no milk/oil/ghee, etc.). A very austere form focusing on simplicity.

• Atthai: Fasting for all 8 days of Paryushan, typically taking only boiled water during the day. A more strenuous period of tapasya.

• Atthai (alternative spelling: Aathai): Eight days of fasting; sometimes used interchangeably with Atthai, depending on local usage.

• Varsitap: A more advanced form, often alternating days of complete fast and one meal for a set period. Considered stricter tapasya.

• Navkarsi and Porsi (meals related to fasting): Navkarsi is the first meal after sunrise (timings vary by locality, typically soon after sunrise). Porsi is the second meal in the day. These meal timings help structure the fast.

Important sectial notes:

• Samvatsari Pratikraman (last day for Shwetambaris) is followed in the evening after sunset; for Digambaris the corresponding day is Kshamavani. This is a concluding spiritual practice of the period.

If you want, I can tailor this to a specific community (Digambar or Shwetambar) and give exact practical guidelines for a family’s Paryushan schedule.