It also provides the ability to customize templates or import custom templates that other people have created.
Calendar data can be imported from Google Calendar, Outlook, Microsoft 365, iCalendar files/URLs, Todoist, Vueminder, CSV files, and many other sources.
The Lite version might be free, but it still provides a lot of functionality that you'd have to pay for elsewhere, including over 90 calendar templates and the ability to insert mini calendars, dates, and calendar legends.
The fully-functional trial version will be converted to the Lite version after 30 days if not purchased. The calendars won't contain any data, but that can be manually entered.