is_wed-thu-fri

# some code to work out how many daycare days are in a particular month.

# params
start_string = "01-09-2021"
days_to_count = 2, 3, 4     # NB monday is 0, sunday 6.
time_period = "365d"

import pandas as pd

start = pd.to_datetime(start_string, dayfirst=True)
v = pd.DataFrame({"Date": pd.date_range(start, start + pd.Timedelta(time_period))})
v["month"] = v.Date.map(lambda y: y.month_name())
v["year"] = v.Date.map(lambda y: y.year)

v["isWTF"] = v.Date.map(lambda y: y.day_of_week in days_to_count)

v.groupby(["month", "year"]).isWTF.sum()