How to add Group calenders on an SharePoint Team Site

Hello, 

Sorry for my bad Englisch. We use MS 365. I would like to have in SharePoint on the Team Site a calender which I can see all colleagues who are in the Teams and see all the meetings and vecations they have. I can create in Outlook a new group calender but I found no way to add this calender into SharPoint. Is this possible to add an Group Calender in SharePoint?
I know there is a way to add a Group calender but then it added automatically an calender and its not the calender I will have. 
Does anybody have an idea? 
Thank you very much.