Good afternoon Luis and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
Is it possible to customize the views (Calendar and Single Event page) in The Events Calendar or is this something exclusive of Events Calendar Pro?
You can customize the views of any of our plugins (both the free ones and the premium add-ons).
This can all be done using the themer’s guide.
You might want to read our Themer’s guide to get a sense of how that works.
Best regards,
Geoff B.