Varshi Tap (Varshitap) calendar is based on the Jain lunar tithis, not fixed English dates. So every year the pattern is the same, but the Gregorian dates change.

1. Basic pattern of Varshi Tap

• Varshi Tap is a 13 month + 13 day tapasya
• It is done in memory of Bhagwan Rishabhdev’s one‑year fast, which ended with Ikshu‑rasa (sugarcane juice) on Akshay Tritiya.
• Typical niyam for tapasvi:

- One day: Upvās (full fast, only boiled water at prescribed times) - Next day: Ekāsan / Beasan (one or two sittings of simple Jain food) - Repeat this alternate‑day pattern until Parna.

2. Jain calendar tithis for Varshi Tap

In the Jain calendar (most commonly followed pattern):

• Start (Arambh):

Chaitra Shukla Ashtami (8th tithi of bright half of Chaitra)

• Parna (completion):

Vaishakh Shukla Tritiya (Akshay Tritiya / Akha Trij) of the next year

Between these two tithis, tapasvi does alternate fast–eat for the full 13 months 13 days.

⚠️ Important: There are slight variations by tradition / local sangh:

• Some panchang or sanghs mark Varshi Tap related rituals from Fagan / Chaitra Krishna Ashtami.
• Some count the “Varshitap of a year” by its Parna year (Akshay Tritiya of that year), even though the Arambh is in the previous Chaitra.

So always follow the niyam given by your Acharya / sadhu / local sangh.

You can see a JainKnowledge explanation about when to start Varshi Tap (with tithis) here:

3. How to make your own Varshi Tap calendar

1. Take a reliable Jain Panchang / Tithi app for your city.
2. Find the tithis:

- Mark Chaitra Shukla Ashtami (start). - Mark Vaishakh Shukla Tritiya (Akshay Tritiya) of the next year (Parna).

1. From the start tithi to Parna tithi:

- Mark every alternate day as Upvās. - The days in between as Ekāsan / Beasan (according to your niyam).

1. Also mark special days if your guru/sangh gives:

- Mahaprabhavna day - Samuh Parna etc.

Because exact English dates depend on:

• which country/time‑zone you are in
• which Jain Panchang you follow (Digambar / Shwetambar, regional differences)

it is best to:

• take the tithis above, and
• match them with your local Jain Panchang for that specific year.

If you tell me your city/country and the year, I can guide you how to read the Panchang for that year’s Varshi Tap dates step‑by‑step.