These docs are for an old release.
Info on upgrading to v4
columnHeaderHtml 3.8.0
Programmatically generates HTML that will be injected on the calendar’s column headings.
function( moment ) -> string
This function will receive a moment object that represents a single column’s date and must return an HTML string to be injected.
Example:
$('#calendar').fullCalendar({
columnHeaderHtml: function(mom) {
if (mom.weekday() === 5) {
return '<b>Friday!</b>';
} else {
return '<i>' + mom.format('LLL') + '</i>';
}
}
});