Where can I use VisualForce Calendars?
VisualForce calendars can be embedded on VisualForce pages, which can then be added to either:
Classic or Lightning record pages
For more information: /wiki/spaces/BPD/pages/382107675
VisualForce pages (possibly with your own filtering controls on the same page)
For more information: /wiki/spaces/BPD/pages/558891009
When should I use VisualForce Calendars?
Generally, our advice is to only use VisualForce calendars for small to medium sized calendars, and when you can’t use Lightning calendars because you require certain features not implemented yet in Lightning calendars.
VisualForce Calendars pros & cons
Many configurable features out of the box
Good performance for small to medium sized calendars
Possible performance issues for large calendars
Some, but limited options for custom business logic
Limited applications, sometimes with an implementation cost