Answer in simple Jain way (for householders):

1. Before the lunar eclipse

Do:

• Finish your food well before the eclipse begins

- Ideally at least 1 muhurt (about 48 min) before the start of the eclipse. - Take a light, simple Jain meal; avoid overeating.

• Decide your pachchakkhan (vow) for that period:

- e.g. Upvas, Ekasana, Chauvihar (no food or water after sunset), more paath, etc.

• Boil and filter water in advance if you will need it for health after the eclipse.
• Keep the house and especially the pūjā place clean, finish routine work early.

Avoid:

• Starting to cook or eat close to the eclipse time.
• Planning heavy social programs or entertainment for that period.

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2. During the lunar eclipse

Do:

• Use the time for adhyātma (spiritual work):

- Recite Navkār Mantra, stavans, sutras - Do Samayik, Pratikraman, swādhyāy (scripture reading) - Do prarthanā (prayer) and bhāvanā (good reflections)

• Keep the body and mind as peaceful and still as possible.

Avoid:

• Eating or drinking during the eclipse (except for genuine medical need).
• Sleeping, gossiping, unnecessary phone/TV, time-pass.
• Violent or passionate activities – anger, fights, harsh speech, etc.

(The idea is: eclipse time is very powerful for karma-bandh as well as karma-kṣay. If you use it for sādhanā, it gives great benefit; if wasted, it can increase bondage.)

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3. After the lunar eclipse ends

Do:

• Take a snān (bath) and change into clean clothes.
• Clean the kitchen and utensils properly.
• Do a short pūjā / Navkār / stavan with gratitude.
• Then do parnā (break your fast / vow) as per the pachchakkhan you took:

- Start with simple, light, Jain-appropriate food and, if allowed, previously boiled water.

• If possible, do a small dān (charity) or help to others.

Avoid:

• Eating food that was lying open during the eclipse – generally it is discarded, not eaten.
• Jumping straight into heavy, rajasic food or loud activities immediately after; allow some calm time.

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In summary, for a Jain, a lunar eclipse is a special time for extra sāyam (self-control) – no eating/drinking during the grahan, more mantra, samayik and pratikraman, snān and clean-up after, and then simple parnā according to your vow.