Date and time formatting is a painful thing to handle in web applications. Handling them at the level of Python, using the datetime library increases the overhead and is pretty complex when it comes to handling time zones correctly. We should standardize the timestamps to UTC when stored in the database, but then, the timestamps need to be processed every time they need to be presented to the users worldwide.

It is a smart thing to defer this processing to the client side, that is, the browser. The browser always knows the current time zone of the user and will be able to do the date and time manipulation correctly. Also, this takes off the necessary overhead from our application servers. We will use Moment.js for this purpose.