The onIncludeTimeCell lets you hide selected time columns and/or customize the column start/end.
onIncludeTimeCell(args)
This event handlers will be fired regardless of showNonBusiness value.
Since version 2019.1.3572, it is possible to adjust args.cell.start and args.cell.end. The cell must not overlap with other timeline cells.
dp.onIncludeTimeCell = function(args) { if (args.cell.start.getDayOfWeek() === 0) { // hide Sundays args.cell.visible = false; } };