0 0 * * 5
│ │ │ │ │
│ │ │ │ └─── Day of week: 5 (Friday)
│ │ │ └───── Month: * (every month)
│ │ └─────── Day of month: * (every day)
│ └───────── Hour: 0 (at hour 0, midnight)
└─────────── Minute: 0 (at minute 0)

0 0 * * 5 /usr/bin/python3 /scripts/generate-weekly-summary.py

0 0 * * 5 /usr/local/bin/weekly-backup.sh

0 0 * * 5 /usr/local/bin/archive-weekly-data.sh

0 0 * * 5 /usr/local/bin/weekly-maintenance.sh

# generate-weekly-summary.py
import json
from datetime import datetime, timedelta
import sqlite3

def generate_weekly_summary():
    conn = sqlite3.connect('/var/data/app.db')
    cursor = conn.cursor()
    
    # Get data from this week (Monday to Friday)
    end_date = datetime.now()
    start_date = end_date - timedelta(days=5)
    
    cursor.execute('''
        SELECT 
            COUNT(*) as total_requests,
            AVG(response_time) as avg_response_time,
            SUM(revenue) as total_revenue
        FROM requests
        WHERE timestamp >= ? AND timestamp < ?
    ''', (start_date, end_date))
    
    metrics = cursor.fetchone()
    
    summary = {
        'week_start': start_date.strftime('%Y-%m-%d'),
        'week_end': end_date.strftime('%Y-%m-%d'),
        'summary': {
            'total_requests': metrics[0],
            'avg_response_time': round(metrics[1], 2) if metrics[1] else 0,
            'total_revenue': round(metrics[2], 2) if metrics[2] else 0
        }
    }
    
    with open(f'/var/reports/weekly_summary_{end_date.strftime("%Y%m%d")}.json', 'w') as f:
        json.dump(summary, f, indent=2)
    
    print(f"{datetime.now()}: Weekly summary generated")
    conn.close()

if __name__ == '__main__':
    generate_weekly_summary()