messiest

from datetime import datetime

from pandas.tseries.offsets import DateOffset, WeekOfMonth
from pandas.tseries.holiday import sunday_to_monday, AbstractHolidayCalendar, \
    Holiday, USMemorialDay, USLaborDay, USColumbusDay, USThanksgivingDay


class BankCalendar(AbstractHolidayCalendar):
    rules = [
        Holiday("New Year's Day", month=1, day=1, observance=sunday_to_monday),