You can hide date from your posts, pages and post archive pages simply by activating WP Date Remover plugin.
Installation & Usage: Install and activate WP Date Remover and you are done. It automatically hides post date from home page and single post pages.
Plugin Features:
- These are the areas that this plugin will remove your dates: homepage, post, page
- Works almost on all of the existing WordPress themes out there, including Thesis Template.
- Works fine on most of WordPress Themes, including 3.0+ WordPress version and Thesis template.