The Date object in JavaScript is the main element when it comes to handling date and time. It records a single point in time as the milliseconds’ number elapsed since the 1st January 1970 00:00: ...

Luxon is a modern lightweight library for parsing, validating, manipulating, and formatting dates in JavaScript. The JavaScript Date object is notoriously hard to use, and JavaScript developers ...

Assuming you are using client side javascript, you need to call either GET or HEAD on the file you want the date from, and than pull the date out of the response. You want something like this ...

The JavaScript Date object was created by copying the implementation of Java's 'java.util.Date' when JavaScript was created in 1995, and the same API has been used for 30 years.