There are a few ways to display WinCalendar from Excel...
1) Refer to the WinCalendar menu tab in Excel:
If you do not see the WinCalendar menu in Excel, please refer to Troubleshooting #1.
2) Right-Click any date to display in the following Option in the Excel Right-Click menu...
Tip: Keep WinCalendar open & it updates automatically as you select dates in Excel. You can turn this on/off from Excel Options...
3) Shortcut: Ctrl+Shift+C
Note the Shortcut for WinCalendar in Excel Cannot be changed... this can only be changed for WinCalendar in Windows (you can change to Windows-Key-C from WinCalendar Options).