[O] Org Ical export doesn't work for 2015?

[Tory S. Anderson]

I use a shell script to look over my agenda and export an ical file, which I 
then upload and bring into my google calendar. But it no longer seems to be 
working; mostly, none of my agenda items I've created since 2015 (or maybe a 
little before, it's hard to tell) are showing up (although some of the items 
that take place IN 2015 but were created earlier are still present). Any idea 
what the problem is? The principle line I'm running is this: 

emacs --batch --user $USER --eval "(progn (org-agenda-list nil nil 'year) 
(org-icalendar-combine-agenda-files))"

As I said, it was working just fine last year. What's changed?