Apologies - I am rambling a bit because I don't know what I'm asking.
The starting time is the key to my workflow. At the beginning of an appointment, I capture the {datetime} in the standard ISO 8601 format, e.g.,
2020-09-06T18:02:17-07:00
Because every other action in my workflow will be a response to this time, I am trying to capture it in the {clipboard} where I can later retrieve it and perform more actions on it (e.g., later in the workflow I will know the duration of the appointment in minutes so I can use {datetime/date/or time} to add the minutes for a resultant end date). However, when I call it back up as a {clipboard} item later on in the workflow, I found that I couldn't manipulate it as a {datetime} object - so, I couldn't use the original ISO 8601 format to do things like add an hour and ten minutes to come up with an end time for said appointment.
Update: I figured out how to do this using the clipboard:
{date +20m {query}:HH:mm}
In case it helps anybody else:
The workflow looks like this:
There's nothing spectacular about the Keyword, but I did have to select "Argument Optional" on the right side of the top line:
I identified the argument (in the top section, next to {query}) in order to enter additional time. Also went ahead and made a couple variables because I know I'm going there, but they're not necessary for the initial transformation (the "duration" variable is necessary to check my work, but I probably won't use it for my final workflow) :
Finally, the clipboard section where I formatted the {datetime} component:
...and a large type display to check the work (note the "duration" variable that I'm using to alter the time so I know it's applying correctly) :
Now I'll start messing with variables because I'm going to want to keep the original time longer than would be feasible for clipboard use.