Such case is now supported.
For now, to display time you should create 3 input channels of Calculated Real type for hours, minutes and seconds. Then add 3 dynamic text elements to the scheme.
The channel formula example: DateTime.Now.Hour
In the next version it is planned to add new formatting for input channels, so it will be enough only 1 channel for this purpose.
Note: You can also display strings from a predefined enumeration. For example, On – Off, etc.