In Jain dharma, sleeping and waking time are mainly guided by discipline, ahimsa, and support for sādhanā (spiritual practice), not by a fixed “rule” of exact hours.

1. Ideal waking time

• Wake early in the morning, preferably in brahm muhurt (about 1½ hours before sunrise) or at least close to sunrise.
• Use this time for:

- snātra / morning shuddhi (cleanliness, bathroom, etc.) - sāmāyik / dhyān (meditation) - pratikraman (if you do morning one) - svādhyāy (study of Jain granths)

Early morning is considered the purest, most peaceful time for dharma.

You can read more about morning timing in Jainism here

2. Ideal sleeping time

• Finish food before sunset.
• After sunset, do:

- evening pratikraman - stotra / paath / prarthanā - short reflection on the day’s karmas

• Then sleep early in the night, not very late.

The idea is: - body gets enough rest - mind is calm - you can easily wake up early for dharma.

Guidance on eating and sleep timing is explained here

3. How many hours to sleep?

• Scriptures don’t fix “exact hours” for householders.
• Practical Jain view:

- Take as much sleep as needed for health (often around 6–8 hours for many adults). - Avoid excess sleep (laziness, carelessness). - Avoid too little sleep (irritation, lack of dharma focus).

More on this point here

Simple practical routine (for a shravak/shravika)

• Evening:

- Eat last meal before sunset - Do pratikraman / stotra - Sleep early (same general time every day)

• Morning:

- Wake in brahm muhurt or near sunrise - Cleanliness, then sāmāyik / pratikraman / svādhyāy - Then navkārsi (first food) after sunrise at proper time, as per your maryādā.

This kind of regular, early-to-bed–early-to-rise routine is fully in line with Jain dharma and supports both health and spiritual growth.