SMART datagrid v.1 > Classes > BaseHoliday
The base date of holiday range. 
The dates as much as prevDays, nextDays will become holiday based on this date.
Defaults to null.
    var columns = [{
        editor: {
            type: "date",
            holidays: [{
                type: "base",
                baseDate: "2016/07/11",
                prevDays: 2,
                nextDays: 3,
                description: "Company Workshop"
            }]
        }
    },
    ...
    ];
    grid.setColumns(columns);