I'm trying to display the current year in the footer of the Pelican website. My understanding is that Pelican uses the jinja2 template. In my footer.html I use:

 <span>{{ now().year }}</span>

And I use it in my base.html like

 {% include 'footer.html' %}

But when I generate the page I get the error "Undefined error: 'now' is not defined." I can't find the reason. Is there any trick/setting/plugin I need to do to use this?