It specifies the before and after period as holiday based on baseDate.
Holiday type value is "base" in column editor setting.
var columns = [{
editor: {
type: "date",
holidays: [{
type: "base",
baseDate: "2016/07/11",
prevDays: 2,
nextDays: 3,
description: "Company Workshop"
}]
}
},
...
];
grid.setColumns(columns);