Hi Michael,
Yes, this can generally be achieved using the ItemTemplate and ValueTemplate properties of the Syncfusion DropDownList component to customize both the dropdown items and the selected value display.
For your reference, we have shared the documentation on DropDownList templates, which explains how to customize the appearance using these templates:
Please review the documentation and let us know if you need assistance recreating a specific Scheduler toolbar date dropdown behavior. We will be happy to help further.
Regards,
Priyanka K