[O] Specifing an agenda org-class time without hours in headline

[Tory S. Anderson]

The documentation [1] says that hour times can be specified on a 
recurring object with a given syntax, but I have never been able 
to make it work. Is the documentation wrong? I try:

--8<---------------cut here---------------start------------->8---
** [#A] 17:30 Parent Time
  <%%(org-class 2016 2 7 2016 12 31 4)> 5:30pm-8:30pm Parent Time
--8<---------------cut here---------------end--------------->8---

but if I remove the 17:30 from the title, it receives no time at 
all. Any help? 


Footnotes: 
[1]  http://orgmode.org/worg/org-faq.html#org-class