Answer

In Jain tradition, the 45 Āgams were written down around 980 to 993 years ago, based on the commonly accepted date of the Vallabhi Council in 980 or 993 Vikram Samvat.

Explanation

According to Śvetāmbara Jain tradition:

• The teachings of Bhagwan Mahavir were first preserved orally by Ganadhars and Jain monks.
• Later, due to fear of loss of memory and decline in oral preservation, the Āgams were compiled and written down at Vallabhi.
• This is traditionally associated with Devardhigani Kshamashraman.

If we calculate from approximately 980–993 Vikram Samvat, that corresponds to about 923–936 CE.

Since the current year is 2026 CE, the writing/compilation of the 45 Āgams was about:

• 2026 − 923 = 1103 years ago
• 2026 − 936 = 1090 years ago

So, it is approximately 1,090 to 1,100 years ago.

Takeaway

The Āgams themselves are much older as oral teachings from Bhagwan Mahavir’s tradition, but the written compilation of the 45 Āgams is traditionally understood to have happened about 1,100 years ago.