diff -u -r ../calcurse-4.4.0/src/ui-calendar.c ./src/ui-calendar.c
--- ../calcurse-4.4.0/src/ui-calendar.c	2019-01-18 22:38:58.000000000 +0000
+++ ./src/ui-calendar.c	2019-03-01 20:47:58.622033795 +0000
@@ -123,8 +123,7 @@
 	if (pthread_equal(ui_calendar_t_date, pthread_self()))
 		return;
 
-	pthread_cancel(ui_calendar_t_date);
-	pthread_join(ui_calendar_t_date, NULL);
+	pthread_kill(ui_calendar_t_date, 0);
 	ui_calendar_t_date = pthread_self();
 }