Hello there,

This is more of a bug report.

I get a 'Bad sexp at line <n>' when using org-contacts-anniversaries in my
org files like so.
* Calendar
:calendar:
%%(org-contacts-anniversaries)

I figured out that this occurs when you have a contact in your
contacts.orgfile with a BIRTHDAY property but no associated value. For
example, this
entry throws up an error.
** Nick
:PROPERTIES:
:EMAIL:
:FIRST_NAME: First
:LAST_NAME: Last
:BIRTHDAY:
:ADDRESS:
:PHONE:
:NOTE:
:END:

But this does not.
** Nick
:PROPERTIES:
:EMAIL:
:FIRST_NAME: First
:LAST_NAME: Last
:BIRTHDAY: 1971-01-01
:ADDRESS:
:PHONE:
:NOTE:
:END:

Would be nice if it is fixed or a solution proposed.

Regards,
Chai

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