In Jainism there isn’t a single universal rule about puja during menstrual periods. Practices vary by tradition and family.

• Digambaras: Some communities observe restrictions on temple entry and participation in certain rites during menstruation, while home worship may be performed with appropriate cleanliness and modesty.
• Śvētāmbara: Some communities likewise restrict temple darśan or participation in certain organized rites during periods, but others permit personal prayer or home puja with standard cleanliness.

Key point: there isn’t a fixed “sixth day” rule in Jain texts. The guidance depends on which lineage (Digambara vs. Śvētāmbara) and local practice your community follows.

If you’d like, tell me which tradition or locality you’re asking about, and I’ll give a more specific overview aligned with that tradition.