cbGetFieldContent and output modifier

I use cbGetFieldContent with the following template
<li><a href="#0" data-date="[[+year]]">[[+year]]</a></li>
The output will be for example 01/01/2016. I need the complete string for the data-date attribute. But just the year for the anchor text. So I want to strip the 01/01/. But it seams that output modifier didn’t work for placeholders. The placeholder [[+year]] is a sub field of a repeater.

As mentioned in Output filter in template of layout?, output modifiers are definitely supposed to work. In your case you might need a custom one to parse it the way you want to, but the output filter on the tag itself should not be the problem.