Nirmal,
It depends on ur Leave how you formed it.
I have framed a new leave policy, in which i have mentioned that the intervening holidays will not be considered.This policies are followed by many companies.
But in my pervious company, it is counted as leave.
Note: It depends on ur leave policy, if it has more than (40) such as Pl -30, sat & sunday leave, national holiday -10-12, CL/Sl - 12 leave options, then it is better to count, otherwise the total leave is below or equal 20 then don't count.
Hope u will be clear.
Regards,
Ramya Shankar