Time Ago Units
Time Ago is a lightweight plugin that modifies the date format on posts from the date the post is published to the amount of time that has passed since the post was published. Dates will now appear as “1 minute ago,” “2 weeks ago,” etc. Time Ago is easy to use! Just upload and activate it, and your date format will automatically be changed on all posts. If you’d like to modify the format, say to only use units of time greater than or equal to days, you can do so from the Settings -> Time Ago submenu.