Used for rendering the header title of the Calendar. To define the header title template, nest an <ng-template> tag
with the kendoCalendarHeaderTitleTemplate directive inside the component tag. The template context is set to the
current component. To get a reference to the current title, use the let-title directive. To provide more details about
the current title, get a reference to the current date by using the let-date directive or get a reference to the
current active view by using the let-activeView directive.

For more examples, refer to the article on templates.

selector: 'my-app',
styles: ['.custom { color: red; }'],
template: `
   <ng-template kendoCalendarHeaderTitleTemplate let-title>
     <span class="custom">{{title}}</span>
class AppComponent { }