I took the template that chaley helped me with in
this thread and made a few small modifications:
Code:
program:
p = format_date(raw_field('pubdate'), 'yyyy');
if p then
strcat(re(p, '^(...).*', '\1'), '0s.', p)
else 'Unknown'
fi
Make sure the column is set to sort by text or searching for unknown won't work.
In Preferences > Look and Feel > Tag Browser, put the column into the "categories with hierarchical items" field. This is the result in the tag browser of my fanfiction VL:
