From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Christopher W. Ryan" <cryan@binghamton.edu>
Subject: how do I search state change dates?
Date: Tue, 1 Jan 2019 14:16:27 -0500
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To: Org-mode mailing list <emacs-orgmode@gnu.org>

I try to keep track of books I want to read, and when I eventually read
them.  I use TODO keyword for books I intend to read, and I change the
state to READING and then DONE, as appropriate. Each state change gets a
date/time stamp.

My preamble is:

#+TODO: TODO(t!) READING(r!) POSTPONED(p!) RESTARTED(s!) | DONE(d!)
NA(n!) ABANDONED(a!)


An entry for a book not yet read might look like this:

** TODO America: the Farewell Tour
   :PROPERTIES:
   :AUTHORLNAME: Hedges
   :AUTHORFNAME: Chris
   :ISBN: 9781501152672
   :DATEADDED: <2018-10-10 Wed>
   :END:

An entry for a book I've read might look like this:

** DONE Northland
   - State "DONE"       from "READING"    [2018-10-21 Sun 22:45]
   - State "READING"    from "TODO"       [2018-10-08 Mon 22:09]
   :PROPERTIES:
   :AUTHORLNAME: Fox
   :AUTHORFNAME: Porter
   :ISBN: 9780393248852
   :DATEADDED: <2018-10-07 Sun>
   :END:


How can I retrieve all the entries for the books I've read in 2018? In
other words, all those that changed state to DONE in 2018?

Thanks.

--Chris Ryan