diff --git a/mapper/src/App.js b/mapper/src/App.js
index 42d1da6..3898220 100644
--- a/mapper/src/App.js
+++ b/mapper/src/App.js
@@ -288,7 +288,7 @@ function Menu({duration, setDuration, end, setEnd, slider, setSlider, submenu, s
 	const chooseMidnight = () => {
 		setSubmenu(false);
 		setSlider([0, duration.num]);
-		setEnd(moment().startOf('day'));
+		setEnd(prevEnd => moment(prevEnd).startOf('day'));
 	};
 
 	const rangeStart = (x) => {