Enter time on Dashboard and get event trigger in node-red

Hello Folks,
I am trying to set my UI to have a time picker to trigger something.
Dashboard will have two dropdown menu. one for hour and one for minute (I don't think there is any other way on dashboard. If there is, I would really like to know).
So when I set the time from Dashboard, is there a way to set a trigger? I installed the bigtimer but I don't think it accepts any "specific time" input.
Thank you for your help.

You can do this with cron-plus node.

There is even a dashboard demo in the built in importable flows (node-red menu, import, examples)

The demo does it with a Cron input but you could swap this out for a date and time entry field.

UPDATE...
Here is an example...

the flow...

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This is the original using cron entries instead of dates and times (much more flexible)...
https://flows.nodered.org/flow/79a66966a6cc655a827872a4af794b94