>...I will ask in the local linux communities for input. Well the proper way to refer to 12-hour format is "a.m." and "p.m.".
Acording to the "Real Academia Española" (Royal Spanish Academy) (1)(2) "ante merídiem" (a.m.) and "post merídiem" (p.m.) is the proper way to use 12-hour format. This applies to all spanish speaking countries, so this might be used for all spanish locales. Thanks to Braulio José Solano Rojas for the links. (1) http://buscon.rae.es/dpdI/SrvltGUIBusDPD?origen=RAE&lema=ante%20mer%EDdiem (2) http://buscon.rae.es/dpdI/SrvltGUIBusDPD?origen=RAE&lema=post%20mer%EDdiem -- Saludos Niko