iCalendar or iCal format for calendar data exchange was initially developed for use under Apple Macintosh operating system, and you can find tons of info how to show iCal on Mac desktop. Nevertheless, iCal calendar can be displayed on Windows desktop as well and there are short reviews of Windows desktop calendar tools that support iCalendars. They let you exchange iCal data between iPhone, iPod, Google Calendar or other web apps and your PC.
1. Desktop iCalendar – desktop calendar consisting of 4 widgets – monthly calendar, events, to-do list and weather widget. Allows to sync calendar and to-do list with Google calendar, exchange data with any device which use .ics (iCalendar) format.
2. Active Desktop Calendar – desktop calendar with appointments notes, tasks, alarms and contacts. Allows data exchange with Outlook and Google Calendar. Supports iCal and CSV formats for data import \ export.
3. Screen Calendar – desktop wallpaper calendar and reminder, shows small or fullscreen calendar for one or two month. Allows easy synchronizing events with MS Outlook. Supports iCal fully that lets you subscribe to iCalendar sources, import events from iCal calendars (including Google Calendar) to the desktop and export events to .ics files.