Using the Wix app to manage your blog
Your blog posts generally appear in the order they were posted. You can, however, change the order by updating the creation dates.
To change the date of a post:
Go to your site in the Wix app.
Tap Manage at the bottom right.
Tap Blog.
Tap Posts.
Tap the post you want to edit.
Tap the Show More icon
.Tap Post Settings.
Tap Edit next to the publish date.
Select a new publish date.
Tap Update.

