diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt
index ddf7dffa6..9a1d52c60 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt
@@ -346,6 +346,6 @@ class MonthView(context: Context, attrs: AttributeSet, defStyle: Int) : View(con
 
     private fun isDayValid(event: Event, code: String): Boolean {
         val date = Formatter.getDateTimeFromCode(code)
-        return Formatter.getDateTimeFromTS(event.endTS) == Formatter.getDateTimeFromTS(date.seconds()).withTimeAtStartOfDay()
+        return event.startTS != event.endTS && Formatter.getDateTimeFromTS(event.endTS) == Formatter.getDateTimeFromTS(date.seconds()).withTimeAtStartOfDay()
     }
 }