Date/time popup action for openbox

date-popup.xml

<openbox_menu>
  <menu id="date-popup" label="Date &amp; Time"
    execute="date +'&lt;openbox_pipe_menu&gt;&lt;item label=&quot;:   %a %B %d, %Y %H:%M:%S&quot;/&gt;&lt;/openbox_pipe_menu&gt;'"
  />
</openbox_menu>

rc.xml

<?xml version="1.0" encoding="UTF-8"?>
<openbox_config xmlns="http://openbox.org/3.4/rc" xmlns:xi="http://www.w3.org/2001/XInclude">
  <keyboard>
    <keybind key="W-D">
      <action name="ShowMenu">
        <menu>date-popup</menu>
      </action>
    </keybind>
  </keyboard>
</openbox_config>

Place the date-popup.xml file into your ~/.config/openbox folder, and add the keybind tag to the appropriate place in your ~/.config/openbox/rc.xml file. This particular keybind is for the Windows-D key combination. You can read more about openbox keybindings, the ShowMenu action, and pipe menus.

The colon in the popup menu is for justification purposes: leading spaces are stripped and I wanted to push the date popup far enough to the right so that the mouse cursor doesn't obscure the text.

for the sake of completeness :
also add to rc.xml:

<file>date-popup.xml</file> 

and to reload settings without relogin:

openbox --reconfigure