Calendars can be created with widely available clients such as:

* [http://www.mozilla.org/projects/calendar/ Mozilla Sunbird and Lightning (a perfect calendar companion for Thunderbird)], for Windows, Mac and Linux.<br /> [[Image:sunbird.png|frameless]]<br />[[Image:lightning.png|frameless]]

* [http://www.microsoft.com/windows/products/windowsvista/features/details/calendar.mspx Windows Calendar], for Windows Vista.<br /> [[Image:vista-calendar.jpg|frameless]]