Published date in index.md

[Arpana18]

Quick observation while working on the design history file:

While working on the design history file, I noticed that in index.md: the date field at the top is manual. If I set today’s date as the publish date and then make revisions over the next few days, I have to keep editing it manually.

Would it be possible to add a script so that the published date freezes once the page goes live? while revisions can continue without changing the original date.