Calender time format

I have a calendar. When I click a day there is a pop up with a form to input from-to dates and save the event.
The date picker I have set to use format 17:26 (not PM/AM).
I save to a table with a date field.

When my calendar gets the event the first text is the time, but displayed in pm/am and not as 24 hours. how do I change that?

(here just in the editor but it is the same in preview)

In the preview it looks like this

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