Calculating First Working Day adding holidays - algorithm

Question

I need to find the first working day of the month. Ideally it should be 01/MM/YYYY but the condition is that it should not be a Saturday or Sunday or a day from the List of Holidays.
List being:
ListOfHoliday
Name Day
Someday 01/01/2021
Someday 01/02/2021
Someday 31/03/2021
Someday 04/07/2021
Someday 25/12/2021
I was trying to use the below algo:
FWD = Text.concat(01, DateTime.CurrentMonthOfToday, DateTime.CurrentyearOfToday)
foreach(holiday in ListOfHoliday)
{
if (FWD == holiday)
{
DateTime.AddDays(ConvertTo.DateTime(FWD), 1)
if (ConvertTo.DateTime(FWD).DayOftheWeek == Saturday)
{
FWD=ConvertTo.Text(DateTime.AddDays(ConvertTo.DateTime(FWD), 2));
} else
{
if ((ConvertTo.DateTime(FWD).DayOftheWeek == Sunday))
{
FWD=ConvertTo.Text(DateTime.AddDays(ConvertTo.DateTime(FWD), 2));
}
}
}
}
But the result I get for the current month is 01/01/0001.

Answer 1

Here is the python code to find the first working day of a given month.
from datetime import datetime, timedelta
def working_day(temp,holid):
if temp.strftime('%A') == 'Saturday':
temp += timedelta(2)
return working_day(temp,holid)
elif temp.strftime('%A') == 'Sunday' or temp in holid:
temp += timedelta(1)
return working_day(temp,holid)
else:
return temp.strftime('%A')
date_format = "%d/%m/%Y"
holidays = ['01/01/2021','01/02/2021','31/03/2021','04/07/2021','25/12/2021']
holid = []
for day in holidays:
holid.append(datetime.strptime(day, date_format))
month = int(input('Enter the month')) # input should be 1,2,3....12
today ='01/'+str(month)+'/2021'
today = datetime.strptime(today, date_format)
print(working_day(today, holid))
output:
Enter the month 12
Wednesday