Apple today announced the availability of iCal 1.5.1, an update to the company’s calendar program, and iSync 1.2.1, an update to its synchronization software. In addition to managing multiple calendars and sharing them over the Internet, iCal now includes an all-new interface for creating and managing event details and improved support for working across time zones. iSync, which allows users to instantly sync their Mac address book and calendars with their mobile phone, Palm OS device, iPod and other Macs, now delivers calendar support for Symbian-based smartphones and supports new mobile phones from Sony Ericsson.