def columbus_day(year, country='<STR_LIT>'):
if country == '<STR_LIT>':<EOL><INDENT>return nth_day_of_month(<NUM_LIT:2>, MON, OCT, year)<EOL><DEDENT>else:<EOL><INDENT>return (year, OCT, <NUM_LIT:12>)<EOL><DEDENT>
in USA: 2nd Monday in Oct
       Elsewhere: Oct 12