FullCalendar event title only allowed One Line
Look in your css file for the following entry:
.fc-event-time, .fc-event-title {
padding: 0 1px;}
and modify it like this
.fc-event-time, .fc-event-title {
padding: 0 1px;
white-space: nowrap;
}
.fc-title {
white-space: normal;
}
Instead of editing the source CSS, you can do this on the HTML page:
<style>
.fc-day-grid-event > .fc-content {
white-space: normal;
}
</style>
Source: Multiline titles in fullcalendar ...