How do I send an email 30 min before a meeting?

It is easier than i thought. but it is possible,

When u click on the “x” Dynamic value, u can manually put in the correct format you would like to use.

Keep in mind that the format i have created from “YYYY/MM/DD HH:mm” has a space in between the days and hours, i do think you also need to put in a space within the Date and Time coming from your source.

But check this out it should work.