iCal – Apple's free calendar application – has been updated.

Version 1.5.2 is "easier and faster to use with its detachable Info Drawer, To Do alarms and notes, more keyboard shortcuts, the ability to publish or subscribe to calendars on servers located behind a firewall, improved alarms, support for events in multiple time zones, as well as other stability and performance improvements," according to Apple.

iCal 1.5.2 requires iSync 1.2.1 or later for synchronizing with mobile phones, PDAs, iPods and other Macs. Apple recommends that users install iCal before installing iSync.