Date format error fixed

Previous format displayed (when the timezone is set to America/Tijuana):
Martes 20th dAmerica/Tijuana agosto 2013, 05:53pm

New format displays:
Martes 20 de agosto 2013, 05:53pm

Adding .st, .nd, .rd, .th next to the number is not correct in spanish.
Merge pull request #3655 from ecoreng/patch-1

Date format error fixed