Build a preparation checklist for {{festival}}.

When it falls this year: {{date}}
How we celebrate at home: {{tradition}} (regional / family style if known)
Household size: {{household_size}}
Budget: {{budget}}

Return organized sections:
1. Cleaning & home prep (with timing — 1 week before, 3 days before, day of)
2. Shopping list — pooja samagri, decorations, ingredients
3. Sweet & savory items to make or order
4. Rangoli / decoration ideas appropriate for the festival
5. The core pooja vidhi — what to do on the day, in order
6. Mantras / aartis specific to this festival
7. Cultural significance — what to share with kids or guests