The DevExpress ASP.NET Gantt extension (GanttExtension) allows you to configure work and non-work time intervals.
The work time settings are stored in the (WorkTimeRules) collection. The following rules are available:
Each rule can contain work time ranges and recurrence settings.
The Recurrence property allows you to configure a rule’s reoccurrence settings (for example, occurrences count and periodicity).
Note that the Gantt chart highlights working hours in timescale only when the "Hours" scale is visible.