diff --git a/js/ct-events.js b/js/ct-events.js
index 0e81047..a05b4d4 100644
--- a/js/ct-events.js
+++ b/js/ct-events.js
@@ -87,7 +87,7 @@ function display_event_date(item) {
 
 	if (start_time === "00:00" && end_time === "00:00") {
 		// localtime "all-day" event
-		const end_day = new Date(end.valueOf() - 86400);
+		const end_day = new Date(end.valueOf());
 		const end_day_date = fmt_date.format(end_day);
 		if (start_date === end_day_date) {
 			return display_date_local(start, start_date);
@@ -98,7 +98,7 @@ function display_event_date(item) {
 
 	if (start.getUTCHours() === 0 && start.getUTCMinutes() === 0 && end.getUTCHours() === 0 && end.getUTCMinutes() === 0) {
 		// UTC "all-day" event
-		const end_day = new Date(end.valueOf() - 86400);
+		const end_day = new Date(end.valueOf());
 		const utc_start_date = fmt_date_utc.format(start);
 		const utc_end_day_date = fmt_date_utc.format(end_day);
 		if (utc_start_date === utc_end_day_date) {