Detect language instead of hard-code.

src/ifm.js

@@ -1413,7 +1413,7 @@ function IFM(params) {
 	this.formatDate = function( timestamp ) {
 		let d = new Date( timestamp * 1000 );
 
-		return d.toLocaleString(self.config.dateLocale);
+		return d.toLocaleString(navigator.language || "en-US");
 	};
 
 	this.getClipboardLink = function( relpath ) {

src/main.php

@@ -31,7 +31,6 @@ class IFM {
 		"tmp_dir" => "",
 		"timezone" => "",
 		"forbiddenChars" => [],
-		"dateLocale" => "en-US",
 		"language" => "###vars:default_lang###",
 		"selfoverwrite" => 0,
 		"session_name" => false,