If you mean Paryushan Parva, then in 2026 the Śvetāmbara 8-day Paryushan begins on 7 September 2026 and ends on 14 September 2026. Samvatsari is on 14 September 2026. For Digambara, Das Lakṣhaṇ Parva begins on 15 September 2026 and ends on 24 September 2026. Exact dates can vary slightly by local Jain panchang. ( jainknowledge.com)

If you meant a different set of “8 important dates” in Jainism, the wording is a bit unclear.