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Use Calcium For:
  • Displaying calendars to the public on your web site
  • Scheduling meetings, vacations, or any kind of events
  • Keeping track of employee availability
  • Room or equipment reservations
  • Anything else you can think of!

Calendars are interactive, and can be for personal use, for sharing among users in your office over your intranet, and for use by Internet users around the world.

Small Calendar

Calcium Demo

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What is Calcium?
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Calcium Logo Calcium is a Web Calendar application. It will run on nearly any machine with a web server that can run Perl CGI scripts; a web browser is all you need to view, edit, and manage any number of calendars from any network connected computer. All administration is done with your browser - after installation, there's no need to log in to the web server.

Learn more about Calcium

A list of the primary features of Calcium


Try out some live calendars with our on-line demos, or set up your own private trial installation on our servers.


What you need to run Calcium

New Features

A list of what's new in the latest version


Calcium Help Pages and FAQs


Host your private Calcium installation on our servers


Calcium Downloads
Download Calcium and see how easy it is to use. The Demo is fully functional; the only limitations are that you cannot create more than one calendar, and a link to our web page is displayed.

Order Calcium
Get details on obtaining a fully registered and supported version of Calcium, or upgrading your existing copy.

"Calcium is excellent! Ran across it while looking for some CGI gadgets for our intranet site. Management needed a calendaring software. They were about to spend several thousand deutschmarks for Exchange server. But now it's Calcium!"