diff --git a/js/nightnight.js b/js/nightnight.js
deleted file mode 100644
index 90998f9..0000000
--- a/js/nightnight.js
+++ /dev/null
@@ -1,58 +0,0 @@
-/** nightnight.みんな v1.0 | MIT License | https://git.io/vwz9N */
-
-window.nightnightHide = function() {
-	var banners = document.getElementsByClassName('nightnight');
-
-	for (var i = 0; i < banners.length; i++) {
-		banners[i].style.display = 'none';
-	}
-};
-
-(function(){
-	var d = new Date();
-	var m = d.getHours() * 60 + d.getMinutes();
-	var bh = 22, bm = 0;
-	var eh = 6, em = 0;
-
-	var use12HourClock = true;
-
-	var b = bh * 60 + bm;
-	var e = eh * 60 + em;
-
-	if (b < e) {
-		console.log("WARNING: NightNight: invalid time interval: sleep time is earlier in the day than wakeup time");
-		return
-	}
-
-	if (m >= b || m <= e) {
-		console.log('NightNight activated')
-
-		// Inject CSS
-		var css = '.nightnight {background: #101314; font-family: Arial, sans-serif; color: #EEE; font-size: 12px; padding: 10%; position: fixed; margin: 0; top: 0; left: 0; width: 100%; height: 100%; z-index: 9999; } .nightnight-skip a {padding: 10px 0; } .nightnight a:link {color: #999; } .nightnight a:visited {color: #999; } .nightnight a:hover {color: #EEE; } .nightnight-timing {font-size: 15px; font-weight: 900; margin-top: 20px; } .nightnight-skip {font-style: italic; font-size: 14px; margin-top: 40px; } .nightnight-credits {position: fixed; bottom: 20px; right: 20px; margin-top: 40px; font-size:9px; }';
-		var head = document.head || document.getElementsByTagName('head')[0];
-		var style = document.createElement('style');
-		style.type = 'text/css';
-		if (style.styleSheet){
-			style.styleSheet.cssText = css;
-		} else {
-			style.appendChild(document.createTextNode(css));
-		}
-		head.appendChild(style);
-
-		// Format time
-		var time = ''
-		if (use12HourClock) {
-			var suffix = eh < 12 ? "AM" : "PM"
-			time = (eh % 13) + ":" + ("0"+em).slice(-2) + " " + suffix;
-		} else {
-			time = ("0"+eh).slice(-2) + ":" + ("0"+em).slice(-2)
-		}
-
-		// Inject DIV
-		var wrapper = document.createElement('div');
-		wrapper.innerHTML = '<div class="nightnight"><div>It&rsquo;s late&hellip;</div><div> Nothing is more important than your sleep.</div> <div> Sleep well, we will catch you in the morning.</div> <div class="nightnight-timing">This site will wake up at ' + 
-			time + 
-			'</div> <div class="nightnight-skip"> <a href="javascript:nightnightHide()">I really want to visit this site right now &rightarrow;</a> </div> </div>';
-		document.body.appendChild(wrapper);
-	}
-})();
\ No newline at end of file