start to work in requests by cleaning up listing code

_config/filters.js

@@ -3,6 +3,7 @@ import { DateTime } from "luxon";
 export default function(eleventyConfig) {
 	/* Filter by date */
 	eleventyConfig.addFilter("filterByDate", (listings, date) => {
+		if (date === null) return listings;
 		date = DateTime.fromISO(date, { zone: "utc" });
 		return listings.filter((listing) => {
 			let postDate = DateTime.fromJSDate(listing.data.date, { zone: "utc" });