diff --git a/themes/rkj-repos.zsh-theme b/themes/rkj-repos.zsh-theme
index a3f1f3dfa..324274686 100644
--- a/themes/rkj-repos.zsh-theme
+++ b/themes/rkj-repos.zsh-theme
@@ -27,10 +27,18 @@ function mygit() {
   fi
 }
 
+ function hour_format() {
+  if [[ -z "${ISO8601_HOURS+x}" ]]; then
+    echo "%I"
+  else
+    echo "%H"
+  fi
+}
+
 function retcode() {}
 
 # alternate prompt with git & hg
-PROMPT=$'%{\e[0;34m%}%B┌─[%b%{\e[0m%}%{\e[1;32m%}%n%{\e[1;30m%}@%{\e[0m%}%{\e[0;36m%}%m%{\e[0;34m%}%B]%b%{\e[0m%} - %b%{\e[0;34m%}%B[%b%{\e[1;37m%}%~%{\e[0;34m%}%B]%b%{\e[0m%} - %{\e[0;34m%}%B[%b%{\e[0;33m%}'%D{"%Y-%m-%d %I:%M:%S"}%b$'%{\e[0;34m%}%B]%b%{\e[0m%}
+PROMPT=$'%{\e[0;34m%}%B┌─[%b%{\e[0m%}%{\e[1;32m%}%n%{\e[1;30m%}@%{\e[0m%}%{\e[0;36m%}%m%{\e[0;34m%}%B]%b%{\e[0m%} - %b%{\e[0;34m%}%B[%b%{\e[1;37m%}%~%{\e[0;34m%}%B]%b%{\e[0m%} - %{\e[0;34m%}%B[%b%{\e[0;33m%}'%D{"%Y-%m-%d $(hour_format):%M:%S"}%b$'%{\e[0;34m%}%B]%b%{\e[0m%}
 %{\e[0;34m%}%B└─%B[%{\e[1;35m%}%?$(retcode)%{\e[0;34m%}%B] <$(mygit)$(hg_prompt_info)>%{\e[0m%}%b '
 PS2=$' \e[0;34m%}%B>%{\e[0m%}%b '