Short answer About 18,448 years are left in Bhagwan Mahavir’s śāsan as of August 21, 2025.

How this is calculated (traditional Jain reckoning)

• Duration of a Tirthankar’s śāsan: 21,000 years.
• Vīr Nirvāṇa Samvat (VNS) starts from Mahavir Bhagwan’s nirvāṇa.
• Widely followed date: 527 BCE = VNS begins.
• Year 2025 CE ≈ VNS 2552.
• Years left = 21,000 − 2,552 = 18,448.

Notes on sect traditions

• Shwetāmbara: generally accepts 527 BCE → about 18,448 years remain.
• Digambara: some traditions place nirvāṇa at 510 BCE (a difference of 17/18 years) → about 18,466 years remain. A less common calculation places it at 468 BCE → about 18,508 years remain.

For a simple reference on Vīr Samvat: