The Google Calendar Birthday Reminder is a Chrome extension designed to help users keep track of birthdays by seamlessly integrating with Google Calendar and Contacts. Once installed, it automatically syncs birthdays from Google Contacts, creating a dedicated "Birthday Calendar" that updates every 24 hours. Users can manually sync or export their birthday calendar as needed, ensuring that important dates are always accessible.

Key features of this extension include timely reminders sent at midnight on each birthday, allowing users to prepare well-wishes in advance. With a one-time payment of $3 to unlock all features, the extension provides a simple yet effective way to stay organized. It is important to note that uninstalling the extension will reset the license, requiring repurchase for continued access to full features.