You can hide date from old posts and show it on new posts, great trick for blogs with evergreen content. There are various plugins that allows you to hide dates but most date remover plugins work globally on your WordPress installation.
But now by using new WordPress plugin by Ben Meredith, you can easily remove date stamp from your blog posts older than 2 weeks, while leaving the date stamp on newer posts.
This is ideal for websites with ever green content like recipes, stories, poems, fitness etc.
How To Use WP Old Post Date Remover?
Simply install and activate WP Old Post Date Remover on your website. Upon activation the plugin automatically hides date from posts older than two weeks.