Six kaals mention in Jain scriptures.

In Jain cosmology, time is endless and divided into two halves (utsarpiṇī and avasarpiṇī). Each half is split into six eras called aras. So, there are six kalas (aras) in the current cycle. They are:

1) Sukham Sukham Kal (Sukhama-sukhama) – time of very great happiness; life and stature are long; needs are easily met. 2) Sukham Kal (Sukhama) – still very happy, but slightly less than the first. 3) Sukham Dukham Kal (Sukhama-dukhamā) – happiness still higher than misery, but misery begins to appear. 4) Dukham Sukham Kal (Dukhamā-sukham) – more misery, but some happiness remains. 5) Dukham Kal (Dukhamā) – predominantly sorrow; religious practice becomes harder. 6) Dukham Dukham Kal (Dukhamā-dukhamā) – extreme misery; spiritual decline is at its peak.

After the sixth ara, the cycle reverses and the next half (utsarpiṇī) begins with the first ara again, continuing forever. Currently, most Jain traditions place us in the 5th ara (Dukhamā) of the avasarpiṇī half-cycle, a period of sorrow and gradual spiritual decline. Different Jain traditions may differ slightly on exact dating, but they agree on the six-ara structure and its overall meaning. You can read more about Kalchakra and the six aras here:

If you’d like, I can also summarize how each ara is described in classical scriptures.