In Jain dharma, Dev Vandan has “niyamit” (regular) timings, not “astrological” timings. Traditionally it is done trikāl – three times a day:

1. Prātaḥ-kāl (Morning)

- After getting ready, doing daily shauch–snān (bath) etc. - Usually after Samayik / Pratikraman or as part of Chaitya-vandan in the temple.

1. Madhyāhna (Midday / Noon time)

- Around the middle of the day, again preferably linked with Chaitya-vandan.

1. Sāyam-kāl (Evening)

- Around sunset / early evening, many do Dev Vandan along with Sandhyā and Pratikraman.

General traditional guidelines

• Do it in a shuddh (pure, clean) state – body and mind.
• Preferably in front of the Jinālaya / image of Jina (temple or home-derasar).
• Avoid doing it:

- In a very late-night casual way after heavy food, TV, etc. - In a state of impurity (asoch etc.), as per your family/ācārya’s niyam.

Both Śvetāmbara and Digambara traditions accept Dev/Chaitya-vandan as a daily upāsanā, mainly centered around morning, noon, and evening; details of vidhi and shloks differ, but the idea of doing it regularly at these times is the same.

You can read more about Trikāl Dev Vandan here: