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we are trying to migrate classic pages to modern and it's a must to maintain the initial publishing date of the page. This date should be visible in the page header:

Required header date change

Digging around we found that there is "FirstPublishedDate" field which is read-only but it's possible to change the value as you can see in the image:

List fields

However, changing this field does not affect the displayed date in the header of the page.

So, I have two related questions:

  1. Where is the date of the page header stored?
  2. How could we change it?

Additional info:

  • We are using PnP-PowerShell to update the fields.
  • Also I found this post from user voice which is very disapointing to me.

Any help is appreciated.

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