How to get a week ago as UTC timestamp in JavaScript?

Question

How can I get a UTC timestamp of a week ago in ISO 8601 format (i.e., YYYY-MM-DDTHH:MM:SSZ) using JavaScript?

I don't want to use any libraries.

Answer 1

Using standard Date functions:

const d = new Date();

d.setDate(d.getDate() - 7);

console.log(d.toISOString());