Calendar Views
Virto Calendar offers the following views: Day, Week, Work Week, Month, Year, Task (Days), Task (Hours) and Multi Source. Select a view in the dropdown in the upper right corner of the calendar.

You can choose the default view, hide views, rename them and change their order in the web part settings (see General settings for the classic web part and Modern calendar settings for the modern one).
The views are described in Simple Views (Day, Week, Work Week, Month and Year), Gantt View (Task (Days) and Task (Hours)) and Multi-Source View.