Holiday calendar - part time

Hi All

Part time employees in our company doesn't get all the public holidays.

We have a public holiday calendar with 12 holidays. part time employees for example working 50% will get only 6 holidays per annum (quota generated).

If public holiday falls on the day they are working , they quota (6) gets deducted

If public holiday falls on the day they are not working, their quota doesnt change.

It means all part time employees do not fall under the company Public holiday calendar.

I am aware public holiday calendar need to be grouped to personnel sub area , do i need to group all part time employees into one personnel subarea

or is there any other alternative.

Thanks

DA