diff --git a/src/index.js b/src/index.js
index af24e37..cb919ed 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,39 +1,42 @@
-var RGX = /([^{]*?)\w(?=\})/g;
+var RGX = /([^{]*?)\w(?=\})/g
 
 var dict = {
 	YYYY: 'getFullYear',
 	YY: 'getYear',
-	MM: function (d) {
-		return d.getMonth() + 1;
-	},
+	MMMM: d => d.toLocaleString('default', { month: 'long' }),
+	MMM: d => d.toLocaleString('default', { month: 'short' }),
+	MM: d => d.getMonth() + 1,
 	DD: 'getDate',
 	HH: 'getHours',
 	mm: 'getMinutes',
 	ss: 'getSeconds',
 	fff: 'getMilliseconds'
-};
+}
 
-export default function (str) {
-	var parts=[], offset=0;
-	str.replace(RGX, function (key, _, idx) {
+export default str => {
+	var parts = [],
+		offset = 0
+	str.replace(RGX, (key, _, idx) => {
 		// save preceding string
-		parts.push(str.substring(offset, idx - 1));
-		offset = idx += key.length + 1;
+		parts.push(str.substring(offset, idx - 1))
+		offset = idx += key.length + 1
 		// save function
-		parts.push(function (d) {
-			return ('00' + (typeof dict[key]==='string' ? d[dict[key]]() : dict[key](d))).slice(-key.length);
-		});
-	});
+		parts.push(d =>
+			('00' + (typeof dict[key] === 'string' ? d[dict[key]]() : dict[key](d))).slice(-key.length)
+		)
+	})
 
 	if (offset !== str.length) {
-		parts.push(str.substring(offset));
+		parts.push(str.substring(offset))
 	}
 
-	return function (arg) {
-		var out='', i=0, d=arg||new Date();
-		for (; i<parts.length; i++) {
-			out += (typeof parts[i]==='string') ? parts[i] : parts[i](d);
+	return arg => {
+		var out = '',
+			i = 0,
+			d = arg || new Date()
+		for (; i < parts.length; i++) {
+			out += typeof parts[i] === 'string' ? parts[i] : parts[i](d)
 		}
-		return out;
-	};
+		return out
+	}
 }