ISO 8601 gives us an international standard for date and time formatting for code processing. We use it for things like SQL timestamps as one example.
However, it’s not how humans are used to reading dates. In the US, we like month then day then year. In Europe, they like day then month then year.
When we want to display dates on a web page, we want to format them in such a way that our viewers understand the date. Right?
The exercise is walking you through the process of formatting strings. In this case, it’s formatting dates and times. It’s showing you that you have the power to organize the datetime elements and create expressive, readable content for your audience.
Does that make sense?