Change default time zone for string dates in Eleventy

eleventy.config.js

import { DateTime } from "luxon";

export default function(eleventyConfig) {
	// requires Eleventy v3.0+
	eleventyConfig.addDateParsing(function(dateValue) {
		if(typeof dateValue === "string") { // override String dates
			return DateTime.fromISO(dateValue, { zone: "America/Chicago" });
		}
	});
};