In this example,holidays are displayed with vertical bar with the desired text using the label property. You can also mention the continuous holidays by specifying the from and to range. For single holiday, you can define from value alone. Holidays are defined as an array of object collection, so that we can display more than one holiday in the project. You can even assign the cssClass to each holiday to change the default color of label and background. More information on the Essential® JS2 Gantt Chart can be found in this documentation section.