These docs are for an old release.
Info on upgrading to v6
stickyHeaderDates
Whether to fix the date-headers at the top of the calendar to the viewport while scrolling.
'auto' (the default), true, false
The default value of 'auto' will look at the height setting and if it is 'auto', meaning the calendar has the potential to be very tall, sticky-header-dates will be activated.
The following demos show sticky date-headers: