Can you help me with this ?

I cant find a formula that gives me the opportunity to know the total
number of all vacation days taken in each month of the year as a
summary sheet
here is my excel table

S/D=B7 Number of leaves allowed =B8 Remaining balance= B9

The table is the following
Vacation taken

(date) from= B18 (date) To= C18 Official Holidays =C44:C53
The formula that i have used to count the number of days taken
excluding the weekends and the holidays is the following:
=NETWORKDAYS(B23,C23,C44:C53)

What i need now is a formula selecting all the table that summarize
for me the number of days taken lets say in the month of March ?

March =B73


Thank you in advance