diff --git a/roles/display/files/show_desktop_timer_unit b/roles/display/files/show_desktop_timer_unit
index 7354dff..c1c2f7c 100644
--- a/roles/display/files/show_desktop_timer_unit
+++ b/roles/display/files/show_desktop_timer_unit
@@ -1,8 +1,8 @@
 [Unit]
-Description=Show desktop every few minutes
+Description=Show desktop every minute between 07:00 and 21:00
 
 [Timer]
-OnCalendar=*:0/5
+OnCalendar=*-*-* 07..21:*:00
 Persistent=true
 
 [Install]