I have a use case like below in Python

Find the 1st business day and last business day of the previous month based on a date.

For example if date is 2024-06-10

first_business_day = '2024-05-01'

last_business_day = '2024-05-31'

I have tried like below

run_date = '2024-06-10'
from datetime import datetime, timedelta, date
import datetime     

d = datetime.datetime.strptime(run_date, '%Y-%m-%d').date()

previous_month_first_business_day = (d - timedelta(days=d.day)).replace(day=1).strftime("%Y-%m-%d")

# result is below 
previous_month_first_business_day = '2024-05-01'

previous_month_last_business_day = (d - timedelta(days=d.day)).strftime("%Y-%m-%d")

# result is below 
previous_month_last_business_day = '2024-05-31'

This is working fine for month of May. But when I want the same result for June

Then using the above I am getting

# result is below 
previous_month_first_business_day = '2024-06-01' # This should be '2024-06-03' 

previous_month_last_business_day = (d - timedelta(days=d.day)).strftime("%Y-%m-%d")

# result is below 
previous_month_last_business_day = '2024-06-30' # This should be '2024-06-29' 

What should I do to achieve the right result