Jai Jinendra 🙏
The parvas that shape the Jain year, and what each one actually commemorates.
2 min read

Anonymous, The Birth of Mahavira, from a Kalpa Sutra, c. 1375–1400, Public domain. Resized and converted to WebP.
A Jain festival is not primarily a celebration. Every parva in the calendar is an occasion for more restraint rather than less: more fasting, more study, more time in the mandir, more giving. The joy is real, but it is the joy of a period set aside, not of a feast.

Photo Dharma from Penang, Malaysia, Pawapuri, temple marking Mahavira's passing, CC BY 2.0. Resized and converted to WebP.
Each of the twenty-four Tirthankars has five kalyanaks, five auspicious events in their life, and each of those has a date in the Jain calendar. Twenty-four multiplied by five gives a great many observances, and a devout household will keep the ones connected to the Tirthankar of its own kshetra with particular care.
The same night, a different occasion. For Jains it marks the nirvan of Bhagwan Mahavir in 527 BCE and the attainment of omniscience by his chief disciple Gautam Swami the following dawn. The lamps commemorate the loss of a living light, so the day is kept quietly, with worship rather than fireworks.