diff --git a/js/ui/panel.js b/js/ui/panel.js
index 91a1de1bd..1a989fe39 100644
--- a/js/ui/panel.js
+++ b/js/ui/panel.js
@@ -556,10 +556,10 @@ Panel.prototype = {
 	/* If there is no am or pm, time format is 24h */
 	let isTime24h = displayDate.toLocaleFormat("x%p") == "x";
 	if (isTime24h) {
-	  /* Translators: This is a time format.  */
+	  /* Translators: This is the time format used in 24-hour mode. */
 	  this._clock.set_text(displayDate.toLocaleFormat(_("%a %R")));
 	} else {
-	  /* Translators: This is a time format.  */
+	  /* Translators: This is a time format used for AM/PM. */
 	  this._clock.set_text(displayDate.toLocaleFormat(_("%a %l:%M %p")));
 	}
         Mainloop.timeout_add(msecRemaining, Lang.bind(this, this._updateClock));