Important Panchang note: Festival dates and exact puja windows can vary by city, sampradaya, amanta/purnimanta calendar and local Panchang. Use this as a planning guide; for exact shubh muhurat, verify the local day's Panchang. Drik Panchang notes that Hindu dates/timings are calculated from solar/lunar positions and can vary by location and calendar system.
Practical Puja Reference
Common Festival Puja Guides
Household-level guidance is provided here. Formal yajna, homa, shraddha and specialized rituals should be performed with a qualified priest and the relevant tradition.