I'm interested in setting up a timer/date stamp on my website, which uses Bootstrap, using JavaScript or whatever is necessary. Basically, when you see a review on somewhere like Google, or a blog post, underneath the photo of the person who made the post and their name, there's always a small bit of text that says how long ago it was written, such as '3 hours ago' or '1 month ago'. See the image below.
How would I get something like this set up on an HTML/CSS/Bootstrap website, so that it automatically updates every day? For example, I would want it to say '1 hour ago' an hour after it was posted and '1 month ago' when a month has passed, automatically.