multiMonthTitleFormat

In Multi-Month views, the format of the text above each month.

<div class='spec' markdown='1'> [format string](date-formatting) </div>

If the calendar spans a single year, the default is { month: 'long' } (ex: "January").

If the calendar spans multiple years, the default is { month: 'long', year: 'numeric' } (ex: "January 2023").