Get the time from epoch of when the sunset is.

sunset-alarm

@@ -95,7 +95,7 @@ fetch_sunset_time() {
 ###############################################################################
 show_alert() {
     TITLE="Sunset Alarm"
-    MESSAGE="Sunset is in ${MINUTES} minute(s)."
+    MESSAGE="Sunset is at $(date -d @${SUNSET_EPOCH} +"%H:%M")."
 
     persistent="-t 0 --wait"
     icon="-i weather-clear -u critical"