title: What type of date string is this? `20210713T015433.354Z`
body: <p>I'm working with some data where I don't know how the time string was generated but an example of what the date string looks like is this <code>20210713T015433.354Z</code></p>
  <p>I've looked at some examples of date strings (<a href="https://pro.arcgis.com/en/pro-app/latest/help/mapping/time/convert-string-or-numeric-time-values-into-data-format.htm" rel="nofollow noreferrer">ex1</a> and <a href="https://css-tricks.com/everything-you-need-to-know-about-date-in-javascript/" rel="nofollow noreferrer">ex2</a>) but haven't had any luck decoding it.</p>
  <p>I know that the first half of the string is YYYYMMDD, and then I think that T means times but then I don't know what <code>015433.354Z</code> is.</p>
  <p>My eventual goal is to make this into a <code>Date</code> objects in JS but I can't deduce the formatting. beyond the day it occured.</p>