Web browsers will be able to access Calendar data using Sun Java System Communications Express as an HTML-based client.
Finally, starting in 2008, the Sun Java System Communications Suite 6 will include an AJAX-based Web client which will provide better "thick client-like" user interactions.
JSON (JavaScript Object Notation) format was added to support AJAX development in the latest patch of Calendar Server 6.3.
Since 2003, the Calendar Server has been included as part of Sun's Java Enterprise System, a collection of infrastructure software applications and tools.
The Calendar Server version 6.3 is supported on multiple operating systems including Sun's Solaris and Red Hat Enterprise Linux.