To get started with Luxon, you need to install it with npm.
npm install luxon
Luxon works a lot like you would expect. You have a
DateTime class that can be used to represent a date and/or time. Many of the common
DateTime functions you would expect exist with this class.
Luxon is a fresh attempt at a JS library to handle dates and times. This seems like it should be a very solvable problem, but dates and times are more challenging than you would think, especially when you factor in time zones. Luxon tries to rely on the browser to help more with this problem. This hopefully creates a better product with less code.
The Luxon library has a good walk-through. Their docs, in general, seem pretty good.
If you need a sound JS library to support Date and Times in JS, give Luxon a try.