getfamth - get abbreviated month names
Getfamth returns a pointer to an array of 12 character pointers. Each of these pointers point to a null terminated string corresponding to a 3 character abbreviation of the names of each month in the year (January through December).
The abbreviated month names are retrieved from the country format structure (see fcountry(C-3)).
C/Base Reference Manual Chapter 13, "Formatting Data Values"