I\'m currently switching my blog from Wordpress to Ghost. There is nginx in front of ghost. After migration i recognized that old urls
http://domain.org/2015/10
I think you should put into server section:
server
rewrite ^/[0-9]*/[0-9]*(/.*) $1 last;
But if you've any additional requests maybe would better in a location section (as you wrote).
location
About more information see on the official nginx documentation.