It would be great if the existing DateTime Input and DateTime Picker components could be modified to allow selecting a datetime range in the one component. E.g. Select Start date and then End date, and change start/end times if needed as well, all in the one calendar interface. It's a lot more intuitive for users to select a date range from one interface rather than have to use two Input components and have to navigate to the right month/year in each, independently.

Bonus features: