In HTML the default <button> type, if you do not specify a type, is "submit".

The calendar creates navigation <button>s, without specifying types, so all of the navigation buttons end up being of type "submit".

This is problematic when wrapping a page in a <form>.

When attempting to navigate the calendar via the calendar buttons, the calendar ends up submitting the form, which is not desired.

Please update the calendar plugin to explicitly set the type to "button". This is a common issue across MDB components. Everywhere a button is created, if the button is not intended to submit a form, the type needs to be set to "button". I've run into this issue more than once already.