If you’re like most people, you probably use Tumblr to keep track of your thoughts and ideas. But if you want to delete all of your posts before a certain date, there are a few steps you can take. First, open up your Tumblr account and sign in. Then, go to the “Accounts” tab and click on the “delete posts” button. Once you do this, all of your posts will be deleted automatically. If you’d rather not have all of your posts deleted at once, you can choose to have them deleted one by one or even over a period of time. Just make sure that each post is deletion-eligible before clicking on the “delete posts” button.