Dolibarr/dolibarr — pull request #515 by atm-maxime (2012-12-05 10:54:29+00:00)
Title: New : option to reset numbering to 0 every month using @99 in the mask

If you're ok with this new option or if you have antoher way of doing it, just tell me. If you accept it like this, I'll modify the lang files to have this option displayed in the infos.