Hi guys, You were right, first I've removed the try/except so the error tickets appeared.
birthday= datetime.strptime(data['birthday'],'%d/%m/%Y' ).strftime('%Y-%m-%d'), <---this is the problem. The issue was involved with dates format(locale), due that facebook users can be es_LA, es_ES, en_US, etc; the date formats are different so now I'm doing some research about how to deal with them and convert them automatically to db 'date' format: YYYY-MM-DD. Lot of thanks for your help!!!! :) -- Atte Luciano Laporta Podazza --