Answer

“16 Uppas” usually means Solah Upvas — a Jain tapasya of doing 16 fasts.

The date is not fixed universally. It depends on:

• Which Jain tradition you follow
• Your local Jain calendar / tithi
• Your guru’s or sangh’s guidance
• Whether you mean 16 continuous upvas or a specific vrat pattern

Explanation

In Jain Dharma, many tapasyas are followed according to the lunar tithi, not only the English calendar date. So the correct date can vary by location and tradition.

Takeaway

Please confirm with your local Jain sangh, temple calendar, or guru bhagwant for the exact 16 Uppas date for your place.