How to bulk Edit Dates in Media Library?

You can use a plugin called Media Library Assistant.

  1. After you install it go to your Media > Assitant (wp-admin/upload.php?page=mla-menu).
  2. Select all the images or the ones you want to edit.
  3. Click on Bulk Actions.
  4. Click on Edit and then Apply.
  5. Then you will see Uploaded on and use the date you wish.

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