I'm trying to add a date and time for an event in org-mode that will repeat on the first Wednesday of each month.

I know I can use the diary-sexp format to identify the first Wednesday of each month, like so:

* My Special Event
  <%%(diary-float t 3 1)>

This works, but I also need to specify the time when that event occurs (ideally both the start and end times). I've tried both of the following:

<%%(diary-float t 3 1) 19:30>
<%%(diary-float t 3 1) 19:30-20:30>

...but neither works.

Is this even possible, and if so, what am I doing wrong?

emacs org-mode
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