How to compute and display a duration given two datetime strings?

[wealthychef1]

Hello, I have this bit of markdown:

- created:: 2023-03-27@04:35 ICT
- completed:: 2023-03-27@05:15 ICT

Is there a way to display the duration where $duration = completed - created$ inline using dataview?
As pseudocode, I'd like something like this:

=this.completed - this.created
But dataview does not know how to interpret my datetime strings.
I think this should be easy for a knowledgable person; can I get a little help?
:-)
Thank you

[AB1908]

This is quite painful because of two reasons, you have the metadata in two separate list items which needs a bit of logic to extract correctly. Secondly, your timestamp format is non-standard so you need to do a bit of manipulation before you parse it.

[wealthychef1]

Yes, that's why I asked here. If it were easy, I would already have solved it. :-) Do you have any suggestions how to solve those problems?
Or perhaps another approach?
Changing the date format is not hard; the question is what formats to use and how to coerce the strings into a date so I can get a duration.