Windows Calendar uses the Internet compatible iCalendar format with the .ics file extension, which allows you to publish and subscribe to calendars over the Internet (New!). After you create a calendar, you can publish it to a Web hosting site where you can share it with others over the Internet. If you want to specify who can access and view a published calendar, you can add password protection. In addition to publishing, you can also subscribe to a published calendar on the Web, so you can stay up-to-date with other people.
Publish a Calendar
In Windows Mail, click the Windows Calendar button on the toolbar.
Click the Share menu, and then click Publish.
Type the calendar name you want.
Enter the location where you want to publish the calendar, such as a Web site, or click Browse.
Select or clear the Automatically publish changes made to this calendar check box.
Select or clear the check boxes for details you want to include: Notes, Reminders, or Tasks.