Use Sherlock to parse times

types/sherlock.js

@@ -0,0 +1,18 @@
+const { ArgumentType } = require('discord.js-commando');
+const sherlock = require('sherlockjs');
+
+module.exports = class SherlockType extends ArgumentType {
+	constructor(client) {
+		super(client, 'sherlock');
+	}
+
+	validate(value) {
+		const time = sherlock.parse(value);
+		if (!time.startDate) return `Please provide a valid starting time.`;
+		return true;
+	}
+
+	parse(value) {
+		return sherlock.parse(value);
+	}
+};