title: RFC 2822 and ISO 8601 date format regex
body: <p>In JavaScript there is <code>Date.parse()</code> method, which parses a string representing an <a href="https://www.rfc-editor.org/rfc/rfc2822#page-14" rel="nofollow noreferrer">RFC 2822</a> or <a href="http://www.ecma-international.org/ecma-262/5.1/#sec-15.9.1.15" rel="nofollow noreferrer">ISO 8601</a> date (<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse" rel="nofollow noreferrer">see MDN</a>). Among tons of various sources on the web, what are the most reliable and comprehensive regular expressions able to match those date formats (separately)?</p>
  <p><strong>UPDATE:</strong>
  If there is no reasonable way to get comprehensive regex to match these formats entirely, at least what are the patterns for these <strong>particular</strong> RFC and ISO formats, <code>Date.parse()</code> method accepts and understands correctly.</p>