In Jainism, “kalyānak” (कल्याणक) means an extremely auspicious, spiritually uplifting event in the life of a very great soul, mainly a Tirthankar.

When people say “Kalyanak” they usually mean one of the five main kalyanaks (Panch Kalyanak) of a Tirthankar:

1. Garbha / Chyavan Kalyanak – when the Tirthankar’s soul enters the mother’s womb (conception).
2. Janma Kalyanak – the Tirthankar’s birth.
3. Diksha Kalyanak – renouncing worldly life and taking diksha (monkhood).
4. Kevalgyan Kalyanak – attaining Kevalgyan (infinite, perfect knowledge).
5. Nirvan Kalyanak – final liberation from the cycle of birth and death.

So, “kalyanak” = such a divine turning‑point, when the soul’s purity and greatness is specially manifest and is celebrated by devas and humans.

Both Digambar and Shwetambar traditions accept these five kalyanaks; details of stories and dates may differ, but the basic meaning is the same.