Created attachment 243307 [details]
gnome-control-center screenshot

(In reply to comment #0)
> Created an attachment (id=243306) [details]
> screenshot
> 
> In Hebrew, gnome-clocks shows the minutes before the hours.
> In the screenshot, it shows 41:21 instead of 21:41.
> 
> There is no bug when viewing the settings in gnome-control-center.
> 
> I am using git master.
> OS: Arch Linux
thank you for reporting the issue. It's already a known one, see https://bugzilla.gnome.org/show_bug.cgi?id=696497#c5 for more details.

I can give you a workaround patch, you can try out, which will not probably go upstream, but you can apply it locally, till this issue is officially resolved.

Created attachment 243787 [details] [review]
workaround patch: using a ":"

Also see bug / patch in bug 703569

One solution I have tried successfully to show the time in RTL language correctly is to mark it for translation and then to replace it by the real ":" character, as was suggested by Matthias Clasen https://bugzilla.gnome.org/show_bug.cgi?id=696497#c10

diff --git a/src/utils.vala b/src/utils.vala
index 3f5ea1d..61e07b7 100644
--- a/src/utils.vala
+++ b/src/utils.vala
@@ -126,7 +126,7 @@ public class WallClock : Object {
 
     public string format_time (GLib.DateTime date_time) {
         // Note that the format uses unicode RATIO and THIN SPACE characters
-        return date_time.format (format == Format.TWELVE ? "%I∶%M %p" : "%H∶%M");
+        return date_time.format (format == Format.TWELVE ? _("%I∶%M %p") : _("%H∶%M"));
     }
 }

and this works. however I have doubts if it's a good solution.

Can the RTL marks or whatever be just straightforward inserted without needing to mark the corresponding string for translation?