In Jainism, Paryushan is one of the most important annual festivals, observed by both the Shwetambar and Digambar sects, though their dates and duration may differ. The festival is determined by the lunar calendar, not the Gregorian calendar, so its start date changes each year.

• Shwetambar Jains: Paryushan typically begins on the 12th day (Dvadasi) of the waning phase of the lunar month of Shravan (August–September) and lasts for 8 days.
• Digambar Jains: Their observance, called Das Lakshan Parva, starts a day later and continues for 10 days.

In the United States, Jain communities follow the same lunar calculations as in India. The exact dates may vary slightly based on the local time zone and how the lunar calendar aligns. Jain centers and temples in the US usually announce the dates each year.

For example:

• In 2024, Shwetambar Paryushan is expected to start on September 3rd and end on September 10th.
• Digambar Das Lakshan Parva will begin on September 4th and end on September 13th.

It is always best to check with your local Jain center for the precise dates as they may vary slightly due to lunar calculations.