Yes, you can backdate blog posts on Shopify. This is possible by editing the post date and time on the post.
Once you have updated the post date and time, it will appear as if the post was published earlier than it actually was.
This technique can be useful if you want to remove old content from your blog and replace it with newer material. You can also use this method to fix mistakes that were made in past blog posts.
Once you have updated the post date and time, be sure to save your changes so that your readers will see the revised information.