Just like weekday, Wordpress uses month global variable to store the month names. It is a single dimensional array set in [wordpress root folder/wp-includes/locale.php]. It stores the localized values of the month names.
Plugin and theme developers can access this global variable, however, to retrieve time and date information about posts within a loop the functions mentioned in weekday can be used.
Back to full list of global variables.
Technorati tags: month

August 15th, 2006 at 10:15 am
[...] $month [...]
November 24th, 2006 at 2:16 pm
[...] Dates: month, weekday_abbrev, weekday, monthnum, m (by “moment in time”), and day [...]