1..7
# ->configure()
 -  automatically changes the date format for the given culture
 -  automatically changes the date format for the given culture
 -  automatically changes the date format for the given culture
 -  automatically changes the date format for the given culture
 -  automatically changes the date format for the given culture
 -  automatically changes the date format for the given culture
 -  throws an InvalidArgumentException if the month_format type does not exist
# Looks like everything went fine.