To open Windows Calendar using Start menu or shortcut on your desktop
Click Start button, and then select Windows Calendar. Alternatively you can click the Windows Calendar shortcut on your desktop.
To open Windows Calendar from Windows Mail application
Open Windows Mail. Click the Tools menu, and then click Windows Calendar.
To open Windows Calendar using WM Restore Tool Manager
Select Windows Calendar command from the WM Restore Tool tray icon menu.
To open Windows Calendar using WM Restore Tool Control Panel
Click Windows Calendar in the Main tab of the Ribbon.
Or you can select Windows Calendar command from the File menu.