How do I hide the blog post publish date?

Remove the date for the blog listing template in theme settings and from the layout settings for individual blog posts

You can choose to show or hide the blog date independently for the blog listing template and for individual blog posts.

To hide the blog date on the blog listing template, open Theme Settings and select Blog, then Blog Listing.

Uncheck the box for Show Blog Post Date?

blog-listing-hide-blog-post-date

To hide the blog date on blog posts, open the Blog Post and click on the Blog Post Header module, then click Layout to expand the options.

Uncheck the box for Show Blog Post Date?

hide-blog-post-date

Hiding the blog post date has to be done individually by post, there is no global setting to update.

Once you have a configured your blog post settings, save a draft as a [Template] to use as a starting point for all new posts by cloning it.