When I open the calendar control I want to disable the user from selecting certain dates, can I do that?
Support Forum
A DatePicker
has this config: https://bryntum.com/products/gantt/docs/api/Core/widget/DatePicker#config-disabledDates
The CellEdit feature knows: https://bryntum.com/products/gantt/docs/api/Grid/feature/CellEdit#property-activeRecord