Hi Jayant,
Swapnil suggested one type of solution (you may have to ignore ESS part in that).
With out configuring Abs.quota for Restricted holiday, how you will count 2 days limit for a particular employee ?
We achieved in one of the earlier project by creating a custom table and store all the RH in that table (in our case it was more than 12 RH - with 2 days quota per year).
We create a absence quota of quota type RH and assign 2 days per year. When it is entered in absence 2001, it will deduct from that quota type and the date will be checked with the custom table's date in 'USER EXIT'. If the absence date is not matching, the USER EXIT will throw some error message.
In this way, you will not disturb the existing PH calendar, but you will achieve your requirement.
regards,
Bala