Was doing something similiar but I didn't find an elegant solution... I stored the original datetime in my own property and printed that with PageChanged as fallback. Then I cleared my property in the saving event on the next save where where PageChangedOnPublish was true.
I want to copy a page in EPiServer, and I want the page I am copying to get the same exact "PageChanged" value that the original page has.
Is this possible?
I'm thinking in the lines of