Calendar.js - Documentation - Holiday

Type:	Name:	Description
number	day	The day that the holiday occurs.
number	month	The month that the holiday occurs.
number	year	The year that the holiday occurs (if the holiday only occurs once. Defaults to null).
string	title	The title for the holiday (i.e. Christmas Day).
Object	onClick	Specifies an event that will be triggered when the holiday is clicked.
string	onClickUrl	Specifies a URL that will be opened when the holiday is clicked (overrides “onClick”).
string	backgroundColor	The background color the day should use (defaults to null).
string	textColor	The text color the day should use (defaults to null).