Calendar - read the month displayed in the calendar

Good morning, using the code inserted in onCalendarScriptInit:
//**************************************************************
//$fecha = “2024-02-01”; // data iniziale del calendario
$fecha = [dini]; // data iniziale del calendario
// fa partire il calendario dalla data $fecha
echo <<<HTML

HTML;
//*************************************************************
I can start the calendar display from a date set in the global variable [dini].
When I then navigate pages with the buttons at the top left (for example, changing the month), I would like to be able to ensure that the user doesn’t go back beyond [dini].
However, I can’t find any SC/Calendar variable that gives me the date or month I’m viewing.
Does anyone know how to do this?
There is an internal variable to read the month displayed in the calendar as you navigate between months.