如何在 python 中获得一年中的第一个营业日期？

Question

How do I determine the first business date of the year?. I am trying using

`Import holidays
 HOLIDAYS= holidays.US()`

Answer 1

I would start by using this existing StackOverflow answer to get the first Monday of the year, then filter by holidays using the holidays module.

import datetime

import holidays

us_holidays = holidays.UnitedStates()


def next_workday(start_date, weekday=0):
    """
    Weekday is an integer. 0=Monday, 1=Tuesday, etc.
    """
    start_date -= datetime.timedelta(days=1)  # Go back 1 to be inclusive of the start date itself

    days_ahead = weekday - start_date.weekday()
    if days_ahead <= 0:  # Target day already happened this week
        days_ahead += 7

    start_date = start_date + datetime.timedelta(days_ahead)

    while 1:
        if start_date in us_holidays:
            start_date += datetime.timedelta(1)
        else:
            return start_date


for i in range(100):
    year = 2000 + i
    print(f'First workday of {year} is', next_workday(datetime.date(year, 1, 1)))