Returns the full name of the month of a date. If no argument is given, then the current local date/time, as returned by date:date-time is used as the default argument. The result is an English month name: one of 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November' or 'December'.
month-name($date-time as string?) ➔ string
The input date-time