This n8n workflow streamlines the management of appointment reminders through a multi-step automation process. It starts with a webhook trigger that captures new appointment data, which is then extracted, formatted, and validated. The data is stored across Google Sheets, Airtable, and PostgreSQL for flexible recordkeeping. The workflow incorporates delays of 1 and 3 days before reminders are sent, ensuring timely notifications. Automated email and SMS reminders are dispatched for each wait period, and confirmation records are simultaneously updated in all storage systems. This setup is ideal for businesses that need to send systematic appointment reminders, reduce no-shows, and keep comprehensive records of communication history.