For an article to become Article of the Month, it must be decided by the staff.
Article of the Month
How to get an article, AOTM status?
In order to get an article, the Article of the Month Status, the staff looks over all stats. How much it was edited, traffic, edits done, people who edited, and significance to the current time. After a list is created, it goes on further for decision. Then after this they pull up the stats again and choose which one is the best. After that, it is posted here.