This Google Apps Script is designed to monitor a specified Google Calendar for deleted events. When an event is detected as deleted, the script automatically sends a notification email to the affected parties. This is particularly useful for businesses or individuals who schedule appointments or meetings through Google Calendar and need to manage cancellations efficiently.

• Event Monitoring: Automatically checks for deleted events in a specific Google Calendar.
• Notification: Sends email notifications when an event is detected as deleted.
• Time Frame Setting: By default, the script checks for events within a four-week time frame, but this can be adjusted as needed.
• Customizable Email Content: The script includes a function to send emails with customizable content, including event details like title, date, and time.

1. Setting the Calendar ID: Specify the Google Calendar ID in the calendarId variable.
2. Event Retrieval: The script retrieves events scheduled in the next four weeks from the specified calendar.
3. Detection of Deletions: By comparing current events with a previously stored list of event IDs, the script identifies which events have been deleted since the last script run.
4. Email Notifications: For each deleted event, it extracts the attendee’s name and email from the event description and sends a cancellation email.
5. Data Storage: The script stores the current event IDs and their details for future reference using Google's PropertiesService.

• Access to Google Apps Script: https://www.google.com/script/start/
• A Google Calendar with events scheduled.
• Events in the calendar should have descriptions formatted in a specific way for the script to correctly extract email addresses and names.

1. Open Google Apps Script and create a new project.
2. Copy the script into the script editor.
3. Replace '<YOUR-EMAIL>@gmail.com' with the email ID of your Google Calendar in the calendarId variable.
4. Ensure the event descriptions in your Google Calendar are formatted to include email and name (as expected by extractEmail and extractName functions).
5. Save and run the script to start monitoring event deletions.

• Customization: The script can be modified to change the time frame for checking events or to alter the email notification's format and content.
• Dependencies: This script relies on Google Calendar and Gmail services provided by Google Apps Script.

Contributions are welcome. Please fork the repository and submit a pull request with your changes.