Parshvanath (Pārśvanātha) is traditionally placed in the 9th to 8th centuries BCE. The most commonly cited traditional date for his birth is 877 BCE. From 2025 CE, that is roughly 2,900 years ago (about 2,900 years since his birth). Some sources give a slightly later window (around the 8th century BCE), so the estimate can vary by a couple of hundred years depending on the tradition. You can read a concise statement of this dating on JainKnowledge here