Google Calendar is a free web-based calendar and scheduling service by Google. Google Calendar can integrate with your website (usually through a form) to automate repetitive administrative scheduling tasks.
Events can be automatically added to your Google Calendar through website form submissions in to ways:
Detailed Event Addition
Create a new event by defining each field (place, date, description, etc.) in the form submission.
Quick Event Addition
Include all information in a single line and have Google parse date, time, and summary. Any included email addresses are automatically invited to the event.