Alejandro Sanchez on "How to manage XML sitemaps"

@Digico Paris i thought i had to write .htaccess rules but here's my "dilemma"

My old links were more or less something like this:
/year/month/postname
ex:
/2012/01/postname
/2012/02/postname
/2012/03/postname
/2012/04/postname
...
i suppose i have to write one rule for each year but Should i also add one rule for each month or is there a way to write a general rule for that??

This would solve my 3rd question, and that would be a huge step!