def holidays(self, year=None):
if not year:<EOL><INDENT>year = date.today().year<EOL><DEDENT>if year in self._holidays:<EOL><INDENT>return self._holidays[year]<EOL><DEDENT>temp_calendar = tuple(self.get_calendar_holidays(year))<EOL>self._holidays[year] = sorted(temp_calendar)<EOL>return self._holidays[year]<EOL>
Computes holidays (non-working days) for a given year.
        Return a 2-item tuple, composed of the date and a label.